Ascend MultiVoice Gateway User manual

MultiVoice Gateway
for the MAX—
User’s Guide
Ascend Communications, Inc.
Part Number: 7820-0583-002
For software version 7.0.0
Preliminary November 10, 1998 November 2, 1998

MAX, and MultiVoice Gateway are trademarks of Ascend Communications, Inc. Other
trademarks and trade names mentioned in this publication belong to their respective owners.
Portions of the software are © 1998 VocalTec Communications Ltd. Ascend software contains
embedded H.323 technology from RADVision Inc. Portions of the software are © 1998
RADVision Inc.
Copyright © October 1998, Ascend Communications, Inc. All Rights Reserved.
This document contains information that is the property of Ascend Communications, Inc. This
document may not be copied, reproduced, reduced to any electronic medium or machine
readable form, or otherwise duplicated, and the information herein may not be used,
disseminated or otherwise disclosed, except with the prior written consent of Ascend
Communications, Inc.

MultiVoice Gateway for the MAX— User’s Guide Preliminary November 10, 1998 iii
Ascend Customer Service
Ascend Customer Service provides a variety of options for obtaining technical assistance,
information about Ascend products and services, and software upgrades.
Obtaining technical assistance
You can obtain technical assistance by telephone, email, fax, or modem, or over the Internet.
Enabling Ascend to assist you
If you need to contact Ascend for help with a problem, make sure that you have the following
information when you call or that you include it in your correspondence:
• Product name and model.
• Software and hardware options.
• Software version.
• If supplied by your carrier, Service Profile Identifiers (SPIDs) associated with your
product.
• Your local telephone company’s switch type and operating mode, such as AT&T 5ESS
Custom or Northern Telecom National ISDN-1.
• Whether you are routing or bridging with your Ascend product.
• Type of computer you are using.
• Description of the problem.
Calling Ascend from within the United States
In the U.S., you can take advantage of Priority Technical Assistance or an Ascend Advantage
Pak service contract, or you can call to request assistance.
Priority Technical Assistance
If you need to talk to an engineer right away, call (900) 555-ASND (2763) to reach Ascend’s
Priority Call queue. The charge of $2.95 per minute does not begin to accrue until you are
connected to an engineer. Average wait times are less than three minutes.
Ascend Advantage Pak
Ascend Advantage Pak is a one-year service contract that includes overnight advance
replacement of failed products, technical support, software maintenance releases, and software
update releases. For more information, call (800) ASCEND-4 (272-3634), or access Ascend’s
Web site at www.ascend.com and select Services and Support, then Advantage Service
Family.
Other telephone numbers
For a menu of Ascend’s services, call (800) ASCEND-4 (272-3634). Or call [phone]
for an operator.

iv Preliminary November 10, 1998 MultiVoice Gateway for the MAX— User’s Guide
Calling Ascend from outside the United States
You can contact Ascend by telephone from outside the United States at one of the following
numbers:
Obtaining assistance through correspondence
Ascend maintains two email addresses for technical support questions. One is for customers in
the United States, and the other is for customers in Europe, the Middle East, and Asia. If you
prefer to correspond by fax, BBS, or regular mail, please direct your inquiry to Ascend’s U.S.
offices. Following are the ways in which you can reach Ascend Customer Service:
• Email from within the U.S.—[email protected]
• Email from Europe, the Middle East, or Asia—[e-mail]
• Fax—[phone]
• Customer Support BBS (by modem)—[phone]
• Write to Ascend at the following address:
Attn: Customer Service
Ascend Communications, Inc.
One Ascend Plaza
1701 Harbor Bay Parkway
Alameda, CA 94502-3002
Finding information and software on the Internet
Visit Ascend’s Web site at http://www.ascend.com for technical information, product
information, and descriptions of available services.
Visit Ascend’s FTP site at ftp.ascend.com for software upgrades, release notes, and
addenda to this manual.
Telephone outside the United States [phone]
Austria/Germany/Switzerland ([phone]
Benelux ([phone]
France ([phone]
Italy ([phone]
Japan ([phone]
Middle East/Africa ([phone]
Scandinavia ([phone]
Spain/Portugal ([phone]
UK ([phone]
For a list of support options in the Asia Pacific Region, you can find additional
support resources at http://apac.ascend.com

MultiVoice Gateway for the MAX— User’s Guide Preliminary November 10, 1998 v
Important safety instructions
The following safety instructions apply to the MultiVoice Gateway:
1Product installation should be performed by trained service personnel only.
2Read and follow all warning notices and instructions marked on the product and included
in the manual.
3The maximum recommended ambient temperature for MultiVoice Gateway models is
104° Fahrenheit (40° Celsius). Take care to allow sufficient air circulation or space
between units when the MultiVoice Gateway is installed in a closed or multirack
assembly, because the operating ambient temperature of the rack environment might be
greater than room ambient.
4Slots and openings in the cabinet are provided for ventilation. To ensure reliable operation
of the product and to protect it from overheating, these slots and openings must not be
blocked or covered.
5Installation of the MultiVoice Gateway in a rack without sufficient air flow can be unsafe.
6If the unit is installed in a rack, the rack should safely support the combined weight of all
equipment it supports. A fully loaded redundant-power MultiVoice Gateway weighs 56
lbs (25.5 kg). A fully loaded single-power MultiVoice Gateway weighs 30 lbs (13.6 kg).
7The connections and equipment that supply power to the MultiVoice Gateway should be
capable of operating safely with the maximum power requirements of the MultiVoice
Gateway. In the event of a power overload, the supply circuits and supply wiring should
not become hazardous. The input rating of the MultiVoice Gateway is printed on its
nameplate.
8Models with ac power inputs are intended for use with a three-wire grounding type
plug—a plug that has a grounding pin. This is a safety feature. Equipment grounding is
vital to ensure safe operation. Do not defeat the purpose of the grounding type plug by
modifying the plug or using an adapter.
9Before installation, use an outlet tester or a voltmeter to check the ac receptacle for the
presence of earth ground. If the receptacle is not properly grounded, the installation must
not continue until a qualified electrician has corrected the problem. Similarly, in the case
of DC input power, check the DC ground(s).
10 If a three-wire grounding type power source is not available, consult a qualified electrician
to determine another method of grounding the equipment.
11 Models with DC power inputs must be connected to an earth ground through the terminal
block Earth/Chassis Ground connectors. This is a safety feature. Equipment grounding is
vital to ensure safe operation.
12 Before installing wires to the MultiVoice Gateway unit’s DC power terminal block, verify
that these wires are not connected to any power source. Installing live wires (that is, wires
connected to a power source) is hazardous.
13 If using DC power, connect the equipment to a 48 VDC supply source that is electrically
isolated from the ac source. The 48 VDC source should be reliably connected to earth
ground.
14 Install only in restricted-access areas in accordance with Articles 110-16, 110-17, and
110-18 of the National Electrical Code, ANSI/NFPA 70.
15 Do not allow anything to rest on the power cord, and do not locate the product where
persons will walk on the power cord.

vi Preliminary November 10, 1998 MultiVoice Gateway for the MAX— User’s Guide
16 Do not attempt to service this product yourself. Opening or removing covers can expose
you to dangerous high voltage points or other risks. Refer all servicing to qualified service
personnel.
17 General purpose cables are provided with this product. Special cables, which might be
required by the regulatory inspection authority for the installation site, are the
responsibility of the customer.
18 When installed in the final configuration, the product must comply with the applicable
safety standards and regulatory requirements of the country in which it is installed. If
necessary, consult with the appropriate regulatory agencies and inspection authorities to
ensure compliance.
19 A rare phenomenon can create a voltage potential between the earth grounds of two or
more buildings. If products installed in separate buildings are interconnected, the voltage
potential might cause a hazardous condition. Consult a qualified electrical consultant to
determine whether or not this phenomenon exists and, if necessary, implement corrective
action before interconnecting the products.
In addition, if the equipment is to be used with telecommunications circuits, take the following
precautions:
• Never install telephone wiring during a lightning storm.
• Never install telephone jacks in wet locations unless the jack is specifically designed for
wet locations.
• Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.
• Use caution when installing or modifying telephone lines.
• Avoid using equipment connected to telephone lines (other than a cordless telephone)
during an electrical storm. There is a remote risk of electric shock from lightning.
• Do not use a telephone or other equipment connected to telephone lines to report a gas
leak in the vicinity of the leak.
Warning: To reduce the risk of fire, communication cable conductors must be 26 AWG or
larger.
Avertissement: Afin de reduire les risques d'incendie, les fils conducteurs du cable de com-
munication doivent etre d'un calibre minimum de 26 AWG (American Wire Gauge), cest-a-dire
d'un minimum de 0,404 mm.
Warnung: Um Feuerrisiken zu reduzieren, müssen die Kommunikationskabel-Anschlüße 26
AWG oder größer sein.

MultiVoice Gateway for the MAX— User’s Guide Preliminary November 12, 1998 vii
Contents
Ascend Customer Service........................................................................................................ iii
Important safety instructions...................................................................................................... v
About This Guide............................................................................ xxi
How to use this guide.............................................................................................................. xxi
What you should know ......................................................................................................... xxii
Documentation conventions.................................................................................................. xxii
Related publications............................................................................................................. xxiii
Chapter 1 Introducing MultiVoice Gateway concepts................................... 1-1
A brief overview .................................................................................................................... 1-1
What is MultiVoice for the MAX? ........................................................................................ 1-2
Basic Multivoice network............................................................................................... 1-2
Multivoice network with a secondary Gatekeeper ......................................................... 1-3
MultiVoice network with overlapping coverage areas................................................... 1-5
MultiVoice applications.........................................................................................................1-8
Basic public long-distance service.................................................................................. 1-8
Local 800 service............................................................................................................ 1-9
Example of traditional 800 service........................................................................ 1-10
Example of using MultiVoice and local 800 service............................................. 1-10
Point-to-Point PBX trunk extension ............................................................................. 1-11
Fault-tolerance and PBX trunk intraflow...................................................................... 1-11
PC-to-Phone calls ......................................................................................................... 1-12
Chapter 2 Getting Acquainted with the MultiVoice Gateway........................ 2-1
What is the MultiVoice Gateway?......................................................................................... 2-1
What items are included in your package? ............................................................................ 2-1
Checking the MultiVoice Gateway base unit ................................................................. 2-1
Checking other package contents ................................................................................... 2-3
Checking the expansion cards......................................................................................... 2-3
DSP card.................................................................................................................. 2-4
ISDN BRI network interface card ........................................................................... 2-4
DRAM card ............................................................................................................. 2-5
PCMCIA flash card................................................................................................. 2-5
Interfaces on the base unit...................................................................................................... 2-6
Common Interfaces......................................................................................................... 2-6
Additional MAX 6000 Interfaces ................................................................................... 2-6
Additional MAX 4000 Interfaces ................................................................................... 2-7
Additional MAX 2000 Interfaces ................................................................................... 2-7

viii Preliminary November 12, 1998 MultiVoice Gateway for the MAX— User’s Guide
Contents
Chapter 3 Setting Up the MultiVoice Gateway Hardware.............................. 3-1
Planning the hardware installation......................................................................................... 3-1
What you need before you start...................................................................................... 3-1
Guidelines for installing MultiVoice Gateway units in a rack ....................................... 3-2
Inserting an expansion card.................................................................................................... 3-3
Setting up the hardware.......................................................................................................... 3-4
Connecting to input power..................................................................................................... 3-6
Connecting to the LAN.......................................................................................................... 3-6
Connecting the MultiVoice Gateway to the T1 Line............................................................. 3-6
Connecting the MultiVoice Gateway to the E1 Line............................................................. 3-6
Grounding.......................................................................................................................3-6
Cable length and characteristics ..................................................................................... 3-7
Interpreting the MultiVoice Gateway LEDs.......................................................................... 3-7
MultiVoice Gateway front panel .................................................................................... 3-7
MultiVoice Gateway back panel................................................................................... 3-11
Starting up the MultiVoice Gateway ................................................................................... 3-13
Chapter 4 Navigating the User Interface........................................................ 4-1
Connections to the user interface........................................................................................... 4-1
Connecting via the MultiVoice Gateway Control port................................................... 4-1
Connecting through TELNET ........................................................................................ 4-1
The Main Edit menu ..............................................................................................................4-2
Understanding menu numbering..................................................................................... 4-3
Common menu items............................................................................................... 4-4
MAX 4000/6000 menu items.................................................................................. 4-4
MAX 2000 menu items ........................................................................................... 4-5
Activating a menu or status window............................................................................... 4-6
Opening menus and profiles ........................................................................................... 4-6
Opening edit fields.......................................................................................................... 4-7
Setting enumerated parameters....................................................................................... 4-8
Saving your changes....................................................................................................... 4-8
Special display characters and keys....................................................................................... 4-8
Privileges and passwords ..................................................................................................... 4-10
The Default profile........................................................................................................ 4-10
Full Access and other administrative profiles............................................................... 4-10
Modifying the Full Access Profile......................................................................... 4-11
Other administrative profiles................................................................................. 4-11
Chapter 5 Configuring the WAN Interfaces.................................................... 5-1
Before you begin.................................................................................................................... 5-1
Configuring T1 lines.............................................................................................................. 5-1
Understanding the line interface parameters .................................................................. 5-2
T1 signalling mode.................................................................................................. 5-2
Assigning an interface ID to NFAS lines................................................................ 5-3
Inband, robbed-bit call control mechanism............................................................. 5-3
Carrier switch type................................................................................................... 5-3
T1 line framing and encoding.................................................................................. 5-3
FDL for monitoring line quality.............................................................................. 5-3
Cable length and the amount of attenuation required.............................................. 5-4
Clock source for synchronous transmission............................................................ 5-4

Contents
MultiVoice Gateway for the MAX— User’s Guide Preliminary November 12, 1998 ix
Collecting DNIS and ANI ....................................................................................... 5-4
Call-by-Call signalling values (MAX 4000/6000).................................................. 5-4
Understanding the channel configuration parameters .................................................... 5-5
Examples of T1 configuration ........................................................................................ 5-5
Configuring a line for ISDN PRI service ................................................................ 5-5
Configuring a line for robbed-bit signalling............................................................ 5-6
Using NFAS signalling............................................................................................ 5-7
Testing T1 connections..........................................................................................................5-8
Performing T1 line diagnostics....................................................................................... 5-8
Validating connectivity................................................................................................... 5-8
Configuring E1 lines............................................................................................................5-10
Understanding the line interface parameters ................................................................ 5-11
E1 signalling mode................................................................................................ 5-11
Carrier switch type................................................................................................. 5-11
E1 framing............................................................................................................. 5-12
Specifying digits received on an incoming R2 call............................................... 5-12
Group signalling .................................................................................................... 5-12
Collecting Caller ID............................................................................................... 5-12
Required settings for DPNSS or DASS 2 switches............................................... 5-12
Clock source for synchronous transmission.......................................................... 5-13
Understanding the channel configuration parameters .................................................. 5-13
Specifying how to use the channel ........................................................................ 5-13
Phone number assignments ................................................................................... 5-13
Examples of E1 configuration ...................................................................................... 5-13
Using ISDN signalling........................................................................................... 5-13
Example of DPNSS signalling configuration........................................................ 5-14
Setting up a nailed connection............................................................................... 5-14
Configuring DNIS and ANI collection for E1 R2................................................. 5-15
Testing E1 connections........................................................................................................ 5-16
Performing E1 line diagnostics..................................................................................... 5-16
Validating the E1 connection........................................................................................ 5-16
ISDN call information .................................................................................................. 5-17
Configuring the serial WAN port......................................................................................... 5-18
Understanding the serial WAN parameters.................................................................. 5-18
Assigning a group number to the serial WAN bandwidth..................................... 5-18
Signals to control the serial WAN data flow......................................................... 5-18
Example of a serial WAN configuration ...................................................................... 5-18
Configuring ISDN BRI network cards................................................................................. 5-19
Understanding the Net BRI parameters........................................................................ 5-20
Assigning a profile name....................................................................................... 5-20
Carrier switch type and how it operates ................................................................ 5-20
BRI Analog Encode............................................................................................... 5-20
Link Type .............................................................................................................. 5-20
Using the BRI line for switched or nailed connections......................................... 5-20
Associating the channel with a slot/port in the MultiVoice Gateway................... 5-20
Assigning the channel to a trunk group................................................................. 5-20
Phone number and Service Profile Identifier (SPID) assignments........................ 5-21
Examples of Net BRI configurations............................................................................ 5-21
Configuring incoming switched connections ........................................................ 5-21
Configuring the Net BRI line for outbound calls .................................................. 5-22
Displaying information about BRI calls................................................................ 5-23

xPreliminary November 12, 1998 MultiVoice Gateway for the MAX— User’s Guide
Contents
Chapter 6 Configuring MultiVoice................................................................... 6-1
MultiVoice call configuration................................................................................................ 6-1
Configuration options ............................................................................................................ 6-2
Understanding the VOIP parameters.............................................................................. 6-2
The Gatekeeper IP address ...................................................................................... 6-2
The secondary Gatekeeper IP address..................................................................... 6-2
Controlling keep-alive registration.......................................................................... 6-3
Reregistration policy parameters............................................................................. 6-3
PIN collection.......................................................................................................... 6-4
Voice compression and coding................................................................................ 6-4
Silence detection and comfort noise generation...................................................... 6-5
Dynamic jitter buffer control................................................................................... 6-5
Type of Service (TOS) management....................................................................... 6-6
Limiting the Gateway’s call volume ....................................................................... 6-6
Controlling call-progress tones on a local Gateway................................................ 6-7
Single-stage dialing ................................................................................................. 6-7
MultiVoice configuration examples....................................................................................... 6-7
Configuring Gatekeepers................................................................................................ 6-7
Configuring Gateway registration policy ....................................................................... 6-8
Configuring PIN authentication...................................................................................... 6-9
Configuring ANI authentication..................................................................................... 6-9
Configuring audio compression.................................................................................... 6-10
Configuring the dynamic jitter buffer........................................................................... 6-12
Configuring the Type of Service (ToS) priority........................................................... 6-15
Configuring Gateway call volumes .............................................................................. 6-16
Configuring local call progress tone processing........................................................... 6-17
Configuring single-stage dialing................................................................................... 6-18
Using authentication ............................................................................................................6-19
When you do not require PIN authentication ............................................................... 6-19
When you require PIN authentication .......................................................................... 6-20
When you require ANI authentication.......................................................................... 6-21
Chapter 7 Configuring Frame Relay............................................................... 7-1
Using the MultiVoice Gateway as a Frame Relay concentrator............................................ 7-1
Kinds of physical network interfaces.............................................................................. 7-2
Kinds of logical interfaces to a Frame Relay switch...................................................... 7-2
Network to Network Interface (NNI)...................................................................... 7-2
User to Network Interface—Data Communications Equipment (UNI-DCE)......... 7-3
User to Network Interface—Data Terminal Equipment (UNI-DTE)...................... 7-3
Types of Frame Relay connections................................................................................. 7-3
Gateway connections............................................................................................... 7-3
Frame Relay circuits................................................................................................ 7-3
Configuring the logical link to a Frame Relay switch........................................................... 7-4
Understanding the Frame Relay parameters................................................................... 7-4
Specifying a profile name and activating the profile............................................... 7-4
Bringing down the datalink when DLCIs are not active......................................... 7-4
Defining the nailed connection to the switch .......................................................... 7-5
Specifying the type of Frame Relay interface......................................................... 7-5
Link management protocol...................................................................................... 7-5
Frame Relay timers and event counts...................................................................... 7-5
MRU (Maximum Receive Units) ............................................................................ 7-6

Contents
MultiVoice Gateway for the MAX— User’s Guide Preliminary November 12, 1998 xi
Examples of Frame Relay profile configuration............................................................. 7-6
Configuring an NNI interface.................................................................................. 7-6
Configuring a UNI-DCE interface .......................................................................... 7-7
Configuring a UNI-DTE interface........................................................................... 7-7
Configuring Connection profiles for Frame Relay................................................................ 7-8
Understanding the Frame Relay connection parameters ................................................ 7-9
Gateway connections (Encaps=FR)......................................................................... 7-9
Frame Relay circuits (Encaps=FR_CIR)................................................................. 7-9
Examples of connection configuration ........................................................................... 7-9
Configuring a Frame Relay gateway connection .................................................... 7-9
Configuring a Frame Relay circuit........................................................................ 7-11
Monitoring Frame Relay connections.................................................................................. 7-12
Displaying Frame Relay statistics................................................................................. 7-12
Displaying link management information .................................................................... 7-13
Displaying DLCI status ................................................................................................ 7-13
Displaying circuit information...................................................................................... 7-14
Turning off a circuit without disabling its endpoints.................................................... 7-14
Chapter 8 Configuring IP Routing................................................................... 8-1
Introduction to IP routing and interfaces ............................................................................... 8-1
IP addresses and subnet masks ....................................................................................... 8-1
Ascend notation .............................................................................................................. 8-2
Zero subnets....................................................................................................................8-3
IP routes.......................................................................................................................... 8-4
How the MultiVoice Gateway uses the routing table.............................................. 8-4
Static and dynamic routes........................................................................................ 8-4
Route preferences and metrics................................................................................. 8-4
MultiVoice Gateway Ethernet interface......................................................................... 8-5
Configuring the local IP network setup ................................................................................. 8-6
Understanding the IP network parameters...................................................................... 8-6
Primary IP address for the Ethernet interface.......................................................... 8-7
Second IP address for the Ethernet interface........................................................... 8-7
Enabling RIP on the Ethernet interface................................................................... 8-8
Ignoring the default route........................................................................................ 8-8
Proxy ARP and inverse ARP................................................................................... 8-8
Telnet password....................................................................................................... 8-8
BOOTP Relay.......................................................................................................... 8-8
Local domain name ................................................................................................. 8-9
DNS or WINS name servers.................................................................................... 8-9
DNS lists.................................................................................................................. 8-9
SNTP service........................................................................................................... 8-9
Specifying SNTP server addresses........................................................................ 8-10
UDP checksums..................................................................................................... 8-10
Examples of IP network configuration......................................................................... 8-10
Configuring the MultiVoice Gateway IP interface on a subnet ............................ 8-10
Configuring DNS................................................................................................... 8-11
Additional terminal-server commands.......................................................................... 8-13
Show commands.................................................................................................... 8-13
DNStab commands................................................................................................ 8-13
Configuring the local DNS table ........................................................................... 8-14
Criteria for valid names in the local DNS table..................................................... 8-14
Entering IP addresses in the local DNS table........................................................ 8-14

xii Preliminary November 12, 1998 MultiVoice Gateway for the MAX— User’s Guide
Contents
Editing the local DNS table................................................................................... 8-15
Deleting an entry from the local DNS table.......................................................... 8-15
Configuring IP routes and preferences................................................................................. 8-16
Understanding the static route parameters.................................................................... 8-16
Route names .......................................................................................................... 8-16
Activating a route .................................................................................................. 8-16
Route’s destination address ................................................................................... 8-16
Route’s gateway address ....................................................................................... 8-17
Metrics, costs, and preferences.............................................................................. 8-17
Tagging routes learned from RIP .......................................................................... 8-17
Type-1 or type-2 metrics for routes learned from RIP.......................................... 8-17
Making a route private........................................................................................... 8-17
A connected route for the Ethernet IP interface .................................................... 8-17
Static route preferences ......................................................................................... 8-18
RIP and OSPF preferences.................................................................................... 8-18
Tagging routes learned from RIP .......................................................................... 8-18
Metrics for routes learned from RIP...................................................................... 8-18
Examples of static route configuration......................................................................... 8-18
Configuring the default route ................................................................................ 8-18
Defining a static route to a remote subnet............................................................. 8-19
Example of route preferences configuration.......................................................... 8-20
Configuring the MultiVoice Gateway for dynamic route updates....................................... 8-20
Understanding the dynamic routing parameters........................................................... 8-20
RIP (Routing Information Protocol)...................................................................... 8-20
Ignoring the default route...................................................................................... 8-21
RIP Policy and RIP Summary ............................................................................... 8-21
Ignoring ICMP Redirects....................................................................................... 8-21
Examples of RIP and ICMP configurations ................................................................. 8-21
Managing IP routes and connections ................................................................................... 8-22
Working with the IP routing table ................................................................................ 8-22
Displaying the routing table .................................................................................. 8-22
Adding an IP route................................................................................................. 8-24
Deleting an IP route............................................................................................... 8-24
Displaying route statistics............................................................................................. 8-24
Pinging other IP hosts................................................................................................... 8-26
Configuring Finger support .......................................................................................... 8-27
Displaying information................................................................................................. 8-27
Displaying the ARP cache..................................................................................... 8-27
Displaying ICMP packet statistics......................................................................... 8-28
Displaying interface statistics................................................................................ 8-28
Displaying IP statistics and addresses ................................................................... 8-29
Displaying UDP statistics and listen table............................................................. 8-30
Displaying TCP statistics and connections............................................................ 8-31
Chapter 9 Configuring OSPF Routing............................................................ 9-1
Introduction to OSPF............................................................................................................. 9-1
RIP limitations solved by OSPF..................................................................................... 9-1
Ascend implementation of OSPF ................................................................................... 9-2
OSPF features ................................................................................................................. 9-2
Security.................................................................................................................... 9-3
Support for variable length subnet masks................................................................ 9-3
Interior gateway protocol (IGP) .............................................................................. 9-3

Contents
MultiVoice Gateway for the MAX— User’s Guide Preliminary November 12, 1998 xiii
Exchange of routing information............................................................................. 9-4
Designated and backup designated routers.............................................................. 9-4
Configurable metrics ............................................................................................... 9-5
Hierarchical routing (areas)..................................................................................... 9-6
Stub areas................................................................................................................. 9-6
Not So Stubby Areas (NSSAs)................................................................................ 9-7
The link-state routing algorithm.............................................................................. 9-8
Configuring OSPF routing in the MultiVoice Gateway ...................................................... 9-10
Understanding the OSPF routing parameters ............................................................... 9-10
Example of configuration adding the MultiVoice Gateway to an OSPF network ....... 9-12
Administering OSPF............................................................................................................ 9-14
Working with the routing table..................................................................................... 9-14
Multipath routing................................................................................................... 9-15
Third-party routing ................................................................................................ 9-15
How OSPF adds RIP routes................................................................................... 9-16
Route preferences .................................................................................................. 9-16
Monitoring OSPF.......................................................................................................... 9-17
Displaying OSPF errors......................................................................................... 9-18
Displaying OSPF areas.......................................................................................... 9-18
Displaying OSPF general information .................................................................. 9-19
Displaying the OSPF link-state database............................................................... 9-20
Displaying OSPF link-state advertisements.......................................................... 9-21
Displaying OSPF neighbors .................................................................................. 9-22
Displaying the OSPF routing table........................................................................ 9-22
Displaying OSPF protocol i/o................................................................................ 9-23
Chapter 10 MultiVoice Gateway System Administration.............................. 10-1
Introduction to MultiVoice Gateway administration........................................................... 10-1
Where to find additional administrative information ................................................... 10-2
Activating administrative permissions.......................................................................... 10-2
System and Ethernet profile configurations......................................................................... 10-3
The system name .......................................................................................................... 10-4
Specifying the unit’s location and the contact for problems ........................................ 10-4
Setting the system date and time................................................................................... 10-4
Console and term rate ................................................................................................... 10-4
Logging out the console port........................................................................................ 10-5
Setting the call attempt time out................................................................................... 10-5
Setting a high-bit-error alarm ....................................................................................... 10-5
Setting an alarm when no trunks are available............................................................. 10-5
Customizing the VT100 interface................................................................................. 10-5
Interacting with the syslog daemon to save ASCII log files......................................... 10-5
Examples of administrative configurations .................................................................. 10-6
Setting basic system parameters............................................................................ 10-6
Configuring the MultiVoice Gateway to interact with syslog.......... 10-6
Terminal-server commands.................................................................................................. 10-7
Displaying terminal-server commands......................................................................... 10-7
Returning to the VT100 menus..................................................................................... 10-8
Commands for monitoring networks............................................................................ 10-9
Commands for use by terminal-server users................................................................. 10-9
SLIP, CSLIP, and PPP commands ........................................................................ 10-9
Menu command..................................................................................................... 10-9
Specifying Telnet hosts ......................................................................................... 10-9

xiv Preliminary November 12, 1998 MultiVoice Gateway for the MAX— User’s Guide
Contents
Specifying raw TCP hosts ................................................................................... 10-10
Telnet command .................................................................................................. 10-11
Rlogin command.................................................................................................. 10-12
TCP command..................................................................................................... 10-13
Administrative commands.......................................................................................... 10-14
Test command...................................................................................................... 10-14
Set command ....................................................................................................... 10-16
Show command ................................................................................................... 10-18
SNMP administration support............................................................................................ 10-22
Configuring SNMP access security............................................................................ 10-22
Enabling SNMP set commands........................................................................... 10-22
Setting community strings................................................................................... 10-23
Setting up and enforcing address security........................................................... 10-23
Resetting the MultiVoice Gateway and determining whether it has reset .......... 10-23
Example of a SNMP security configuration........................................................ 10-23
Setting SNMP traps .................................................................................................... 10-24
Understanding the SNMP trap parameters.......................................................... 10-24
Example of an SNMP trap configuration ............................................................ 10-24
Ascend enterprise traps............................................................................................... 10-25
Alarm events........................................................................................................ 10-25
Security events..................................................................................................... 10-26
Supported MIBs.......................................................................................................... 10-26
Appendix A Troubleshooting.............................................................................. A-1
LEDs ..................................................................................................................................... A-1
MultiVoice Gateway front panel ................................................................................... A-1
MultiVoice Gateway back panel.................................................................................... A-5
ISDN cause codes ................................................................................................................. A-7
Common problems and their solutions............................................................................... A-12
Configuration problems............................................................................................... A-12
DO menus do not allow most operations.............................................................. A-12
The MultiVoice Gateway cannot dial out on a T1 or E1 line............................... A-13
No Channel Avail error message.......................................................................... A-13
Hardware configuration problems............................................................................... A-13
Cannot access the VT100 ..................................................................................... A-13
Fault LED is off but no menus are displayed....................................................... A-13
Random characters appear in the VT100 interface............................................... A-14
A Power-On Self Test fails................................................................................... A-14
ISDN PRI and BRI interface problems........................................................................ A-14
Calls are not dialed or answered reliably.............................................................. A-14
The Net/BRI lines do not dial or answer calls...................................................... A-15
No Logical Link status ......................................................................................... A-15
WAN calling errors occur in outbound Net/BRI calls ......................................... A-15
Callers dial destination correctly, but nothing happens........................................ A-16
Callers dial destination, hear tick-tock sound, but nothing happens .................... A-16
Callers hear a fast busy tone after dialing, using single-stage dialing.................. A-16
Problems indicated by the LEDs ................................................................................. A-17
LEDs do not illuminate for the secondary E1 or T1 line...................................... A-17
The E1 or T1 line is in a Red Alarm state ............................................................ A-17
A PRI line is in use and the Alarm LED blinks.................................................... A-18

Contents
MultiVoice Gateway for the MAX— User’s Guide Preliminary November 12, 1998 xv
Appendix B Provisioning the Switch................................................................. B-1
Provisioning the switch for T1 access.................................................................................... B-1
Provisioning the switch for T1 PRI access ............................................................................ B-2
What you need from your E1/PRI service provider............................................................... B-2
Supported WAN switched services........................................................................................ B-3
Provisioning the switch for ISDN BRI access....................................................................... B-3
Parameters on the MultiVoice Gateway......................................................................... B-3
Information required from the ISDN BRI provider........................................................ B-4
SPIDs for AT&T 5ESS switches............................................................................. B-5
SPIDs for Northern Telecom DMS-100 switches................................................... B-5
Appendix C MultiVoice Gateway Technical Specifications.............................. C-1
Battery.................................................................................................................................... C-1
Power requirements................................................................................................................ C-2
Environmental requirements.................................................................................................. C-2
Alarm relay operating specifications ..................................................................................... C-3
Appendix D Cables and Connectors.................................................................. D-1
User interface specifications................................................................................................. D-1
Control port and cabling pinouts for the Control Monitor and MIF.............................. D-2
Pinouts for the Palmtop Controller ............................................................................... D-2
Palmtop port and cabling pinouts for a Control Monitor............................................... D-3
Ethernet interface specifications........................................................................................... D-4
10Base-T........................................................................................................................D-4
100Base-T...................................................................................................................... D-4
AUI ................................................................................................................................ D-4
T1/PRI interface specifications............................................................................................. D-5
T1/PRI CSU requirements ............................................................................................ D-5
Port with internal CSU ........................................................................................... D-5
Port without internal CSU ...................................................................................... D-5
T1/PRI cable specifications ........................................................................................... D-6
T1/PRI crossover cable: RJ48C/RJ48C.................................................................. D-7
T1/PRI straight-through cable: RJ48C/RJ48C ....................................................... D-8
T1/PRI straight-through cable: RJ48C/DA-15....................................................... D-9
T1/PRI crossover cable: RJ48C/DA..................................................................... D-10
T1/PRI straight-through cable: RJ48C/Bantam.................................................... D-11
T1 RJ48C-Loopback plug .................................................................................... D-11
T1/PRI WAN ports...................................................................................................... D-12
WAN switched services available to the MultiVoice Gateway................................... D-12
E1/PRI interface specifications........................................................................................... D-12
E1/PRI cable specifications ......................................................................................... D-12
E1/PRI crossover cable: RJ48C/RJ48C................................................................ D-13
E1/PRI straight-through cable: RJ48C/RJ48C ..................................................... D-14
E1/PRI straight-through cable: RJ48C/DA-15..................................................... D-15
E1/PRI crossover cable: RJ48C/DA..................................................................... D-16
E1/PRI straight-through cable: RJ48C/Bantam.................................................... D-17
E1/PRI straight-through cable: MultiVoice Gateway BNC to RJ48C ................. D-18
E1/PRI WAN ports...................................................................................................... D-19
ISDN BRI interface specifications...................................................................................... D-19
For the Net/BRI module .............................................................................................. D-19

xvi Preliminary November 12, 1998 MultiVoice Gateway for the MAX— User’s Guide
Contents
For the Host/BRI module............................................................................................. D-20
Cable length requirements ........................................................................................... D-20
Serial WAN cabling specifications..................................................................................... D-20
V.35 cable to WAN ..................................................................................................... D-21
RS-449 cable to WAN................................................................................................. D-22
Appendix E Warranties and FCC Regulations.................................................. E-1
Product warranty.................................................................................................................... E-1
Warranty repair............................................................................................................... E-1
Out-of warranty repair .................................................................................................... E-2
FCC Part 15 Notice................................................................................................................ E-2
FCC Part 68 Notice................................................................................................................ E-2
IC CS-03 Notice..................................................................................................................... E-3
Index.......................................................................................... Index-1

MultiVoice Gateway for the MAX— User’s Guide Preliminary November 12, 1998 xvii
Figures
Figure 1-1 Example of call routing over circuit-switched PSTN........................................ 1-1
Figure 1-2 Example of a MultiVoice network..................................................................... 1-2
Figure 1-3 Example of a MultiVoice network with a secondary Gatekeeper ..................... 1-4
Figure 1-4 Example of a MultiVoice network with overlapping coverage areas................ 1-6
Figure 1-5 Example of an ISP offering data and voice services.......................................... 1-9
Figure 1-6 Traditional 800 environment ........................................................................... 1-10
Figure 1-7 Using MultiVoice and local 800 service.......................................................... 1-10
Figure 1-8 Connecting two sites by MultiVoice and a leased connection ........................ 1-11
Figure 1-9 Alternative voice-traffic paths between sites................................................... 1-11
Figure 1-10 Virtual private network using PC telephony.................................................... 1-12
Figure 2-1 MultiVoice Gateway base unit........................................................................... 2-2
Figure 2-2 Redundant MultiVoice Gateway base unit........................................................ 2-2
Figure 2-3 DC power source on the MultiVoice Gateway.................................................. 2-2
Figure 2-4 MAX 4004 base unit.......................................................................................... 2-3
Figure 2-5 MAX 2000 T1/PRI base unit............................................................................. 2-3
Figure 2-6 MAX 2000 E1/PRI base unit............................................................................. 2-3
Figure 2-7 Series56 DSP card ............................................................................................. 2-4
Figure 2-8 ISDN BRI network interface cards.................................................................... 2-4
Figure 2-9 DRAM card........................................................................................................ 2-5
Figure 2-10 PCMCIA card .................................................................................................... 2-5
Figure 3-1 MultiVoice Gateway units installed in a rack.................................................... 3-2
Figure 3-2 Inserting an expansion card into a MultiVoice Gateway slot............................ 3-3
Figure 3-3 Tightening slot card thumbscrews..................................................................... 3-4
Figure 3-4 Dimensions of the MAX 6000 single power supply unit .................................. 3-4
Figure 3-5 Dimensions of the redundant power supply unit ............................................... 3-5
Figure 3-6 Mounting the MultiVoice Gateway in a rack .................................................... 3-5
Figure 3-7 One set of links for each E1 port ....................................................................... 3-7
Figure 3-8 Location of the MultiVoice Gateway LEDs...................................................... 3-7
Figure 3-9 Location of the LEDs on the Redundant MultiVoice Gateway......................... 3-8
Figure 3-10 Location of the MAX 2000 LEDs ..................................................................... 3-9
Figure 3-11 Ethernet interface LEDs on MultiVoice Gateway back panel......................... 3-11
Figure 3-12 Ethernet interface LEDs on the MAX 4000 MultiVoice Gateway
back panel ................................................................................................... 3-12
Figure 4-1 MultiVoice Gateway Main Edit menu and Status windows
for the MAX 6000 and MAX 4000 .............................................................. 4-2
Figure 4-2 MultiVoice Gateway Main Edit menu and Status windows
for the MAX 2000......................................................................................... 4-3
Figure 4-3 Slot and port numbering in the MAX 6000/4000 MultiVoice Gateway ........... 4-3
Figure 4-4 Slot and port numbering in the MAX 2000 MultiVoice Gateway..................... 4-4
Figure 7-1 The MultiVoice Gateway operating as a Frame Relay concentrator................. 7-1
Figure 7-2 Types of logical interfaces to Frame Relay switches......................................... 7-2
Figure 7-3 Network to Network interface (NNI) in a MultiVoice Gateway unit................ 7-2
Figure 7-4 User to Network Interface-Data Communications Equipment (UNI-DCE)...... 7-3

xviii Preliminary November 12, 1998 MultiVoice Gateway for the MAX— User’s Guide
Figures
Figure 7-5 User to Network Interface - Data Terminal Equipment (UNI-DTE)................. 7-3
Figure 7-6 Example of NNI connection to another switch.................................................. 7-6
Figure 7-7 Example of UNI-DCE connection to an end-point (DTE) ................................ 7-7
Figure 7-8 UNI-DTE connection to a Frame Relay switch................................................. 7-7
Figure 7-9 Gateway connections....................................................................................... 7-10
Figure 7-10 A Frame Relay circuit...................................................................................... 7-11
Figure 8-1 A class C IP address........................................................................................... 8-2
Figure 8-2 A 29-bit subnet mask and number of supported hosts....................................... 8-2
Figure 8-3 Sample IP network............................................................................................. 8-7
Figure 8-4 Creating a subnet for the MultiVoice Gateway ............................................... 8-10
Figure 8-5 Example of a local DNS table.......................................................................... 8-13
Figure 8-6 Two-hop connection that requires a static route when RIP is off.................... 8-19
Figure 9-1 Autonomous system border routers................................................................... 9-3
Figure 9-2 Adjacency between neighboring routers............................................................ 9-4
Figure 9-3 Designated and backup designated routers........................................................ 9-4
Figure 9-4 OSPF costs for different types of links.............................................................. 9-5
Figure 9-5 Dividing an AS into areas.................................................................................. 9-6
Figure 9-6 Sample network topology.................................................................................. 9-8
Figure 9-7 Example of an OSPF setup.............................................................................. 9-12
Figure A-1 MultiVoice Gateway front-panel LEDs............................................................ A-1
Figure A-2 Location of LEDs on the Redundant MultiVoice Gateway.............................. A-2
Figure A-3 Location of the MAX 2000 LEDs .................................................................... A-3
Figure A-4 Ethernet interface.LEDs on MultiVoice Gateway back panel.......................... A-5
Figure A-5 Ethernet interface LEDs on the MAX 4000 back panel................................... A-6
Figure D-1 Control Monitor and MIF Palmtop port and cable ........................................... D-3
Figure D-2 RJ48C/RJ48C crossover cable.......................................................................... D-7
Figure D-3 RJ48C/RJ48C straight-through cable specifications ........................................ D-8
Figure D-4 RJ48C/DA-15 straight-through cable............................................................... D-9
Figure D-5 RJ48C/DA crossover cable............................................................................. D-10
Figure D-6 RJ48C/Bantam straight-through cable............................................................ D-11
Figure D-7 RJ48C/RJ48C crossover cable........................................................................ D-13
Figure D-8 RJ48C/RJ48C straight-through cable specifications ...................................... D-14
Figure D-9 RJ48C/DA-15 straight-through cable............................................................. D-15
Figure D-10RJ48C/DA crossover cable............................................................................. D-16
Figure D-11RJ48C/Bantam straight-through cable............................................................ D-17
Figure D-12MultiVoice Gateway BNC to RJ-48C straight-through cable........................ D-18

MultiVoice Gateway for the MAX— User’s Guide Preliminary November 12, 1998 xix
Tables
Table 3-1 MultiVoice Gateway front-panel LEDs ............................................................ 3-8
Table 3-2 Redundant MultiVoice Gateway LEDs ........................................................... 3-9
Table 3-3 MAX 2000 LEDs............................................................................................... 3-9
Table 3-4 Ethernet interface LEDs on back panel ......................................................... 3-11
Table 3-5 Ethernet interface LEDs on back panel ......................................................... 3-12
Table 4-1 Special keys for Palmtop Controller and Control Monitor displays ................. 4-8
Table 6-1 Impact of configurable voice frames on IP packet size................................... 6-11
Table 6-2 Configuration dependencies affecting jitter buffer processing........................ 6-13
Table 6-3 Jitter buffer length (in milliseconds) for the G.711 audio codec..................... 6-13
Table 6-4 Jitter buffer length (in milliseconds) for the G.729(A) audio codec................ 6-14
Table 8-1 IP address classes and number of network bits ................................................. 8-1
Table 8-2 Standard subnet masks ...................................................................................... 8-3
Table 9-1 Link state databases for network topology in Figure 9-6 ................................ 9-8
Table 9-2 Shortest-path tree and resulting routing table for Router-1............................... 9-9
Table 9-3 Shortest-path tree and resulting routing table for Router-2............................... 9-9
Table 9-4 Shortest-path tree and resulting routing table for Router-3............................... 9-9
Table 10-1 Network-specific Show commands .............................................................. 10-19
Table C-1 MultiVoice Gateway source power requirements ............................................ C-2
Table C-2 Redundant-power MultiVoice Gateway requirements .................................... C-2