Multitech MultiVOIP MVP100GK Gatekeeper User manual

MVP100GK
User Guide

User Guide
Gatekeeper
MVP100GK
S000353B Revision B
This publication may not be reproduced, in whole or in part, without prior expressed written permission from Multi-
Tech Systems, Inc. All rights reserved.
Copyright © 2004 by Multi-Tech Systems, Inc.
Multi-Tech Systems, Inc. makes no representations or warranty with respect to the contents hereof and
specifically disclaims any implied warranties of merchantability or fitness for any particular purpose. Furthermore,
Multi-Tech Systems, Inc. reserves the right to revise this publication and to make changes from time to time in the
content hereof without obligation of Multi-Tech Systems, Inc. to notify any person or organization of such revisions
or changes.
Record of Revisions
Revision Date Description
A 08/01/04 Manual released.
B 09/20/04 Manual updated to include new 25 user license and version 8.06.A7 software.
Patents
This device covered by one or more of the following patents: 6,031,867; 6,012,113; 6,009,082; 5,864,560;
5,815,503; 5,812,534; 5,790,532; 5,764,628; 5,764,627; 5,754,589; 5,724,356; 5,673,268; 5,673,257; 5,628,030;
5,619,508; 5,617,423; 5,600,649; 5,592,586; 5,577,041; 5,574,725; 5,559,793; 5,546,448; 5,546,395; 5,535,204;
5,500,859; 5,471,470; 5,463,616; 5,453,986; 5,452,289; 5,450,425; 5,309,562; 5,301,274
Trademarks
Trademarks of Multi-Tech Systems, Inc.: Multi-Tech, and Multi-Tech logo.
Windows is a registered trademark of Microsoft Corporation in the United States and other countries.
All products or technologies are the trademarks or registered trademarks of their respective holders.
Technical Support
Country By Email By Phone
France: [email protected] (33) 1-64 61 09 81
India: [e-mail] 91 (124) 6340778
U.K.: [email protected]k (44) 118 959 7774
U.S. and Canada: [email protected] [phone]
Rest of the World: [e-mail] [phone]
World Headquarters
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, Minnesota 55112
[phone] or [phone]
Fax [phone]
Internet Address: http://www.multitech.com

Contents
CHAPTER 1 - INTRODUCTION AND DESCRIPTION.............................................................. 4
Gatekeeper Basics......................................................................................................................................................................4
Features ......................................................................................................................................................................................6
Front Panel.................................................................................................................................................................................7
Back Panel ..................................................................................................................................................................................8
Specifications..............................................................................................................................................................................8
CHAPTER 2 - INSTALLATION................................................................................................. 9
Safety Warnings.........................................................................................................................................................................9
Safety Recommendations for Rack Installations ....................................................................................................................9
Cabling......................................................................................................................................................................................10
Loading Gatekeeper Software ................................................................................................................................................12
Gatekeeper Configuration ......................................................................................................................................................16
CHAPTER 3 – GATEKEEPER FUNCTIONALITY.................................................................. 27
Getting Started.........................................................................................................................................................................27
VOIP Network Example .........................................................................................................................................................29
CHAPTER 4 - GATEKEEPER PROTOCOLS........................................................................ 51
CHAPTER 5 – GATEKEEPER SOFTWARE .......................................................................... 53
Configuration ...........................................................................................................................................................................54
Statistics....................................................................................................................................................................................61
Connection................................................................................................................................................................................63
GateKeeper...............................................................................................................................................................................64
Software User License Agreement .........................................................................................................................................83
CHAPTER 6 - WARRANTY, SERVICE, AND TECH SUPPORT............................................ 84
Repair Procedures for U.S. and Canadian Customers.........................................................................................................84
Technical Support....................................................................................................................................................................85
Regulatory Information ..........................................................................................................................................................85
FCC Declaration ......................................................................................................................................................................86
INDEX...................................................................................................................................... 88

Chapter 1 – Introduction and Description
Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 4
Chapter 1 - Introduction and
Description
Welcome to Multi-Tech’s new MultiVOIP™ Gatekeeper, Model MVP100GK, a turnkey hardware and software
solution that enables network managers and intranet managers to define and control how H.323 voice traffic is
managed over IP networks. The Gatekeeper is a complementary product to the MultiVOIP family. The
Gatekeeper is an industry-standard mechanism for call control and routing, basic telephony services, H.323
bandwidth usage control, total network usage control, and overall system administration and security policies. It
includes fast, easy-to-use interfaces that network managers can use to modify or update zone configurations
when an individual on the network needs additional services. And, it provides call centers with the capability to
perform needs-based call routing as well as providing a variety of other automatic call distribution features.
Figure 1-1. Gatekeeper
Gatekeeper facilitates interoperability between PBX dial plans and IP-based terminals. With it, call centers can
route call on the basis of need and implement other automatic call distribution features, as well.
Gatekeeper Basics
Gatekeepers are optional within H.323 networks. However, when they are present, gateways (voip units) and
other network endpoint devices (like terminals and Multipoint Control Units used in conferences) must use
Gatekeeper services. There are four functions that H.323 Gatekeepers must provide to the network and many
other functions, both standard and proprietary, that the Gatekeeper may offer to network participants.
Mandatory Gatekeeper Functions
The mandatory Gatekeeper functions are address translation, admission control, bandwidth control, and zone
management.
Address Translation
The Gatekeeper supports aliases, such as conventional E.164 phone numbers, for each endpoint registered
within the zone. Users call each other within a zone by simply dialing a number or string of characters instead of
an IP address. This function is particularly important when a phone on the circuit-switched network tries to call a
phone connected to a gateway on an IP network.
Admission Control
The Gatekeeper determines which network participants can and cannot make calls, according to established
network permissions and rules. The Gatekeeper controls admission using H.225 “RAS” messages (Registration,
Admission, Status).

Chapter 1 – Introduction and Description
Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 5
Bandwidth Control
With the Gatekeeper, the network administrator can specify bandwidth limitations within a Gatekeeper’s zone and
can specify a bandwidth limit for gateway endpoints. The Gatekeeper controls bandwidth using H.225 RAS
messages. A Gatekeeper may determine there is no bandwidth available for a call or no additional bandwidth
available for an ongoing call requesting an increase. Dynamic (situation-dependent) changes in bandwidth
allocation are typically called “bandwidth management,” which is considered an optional Gatekeeper function.
Zone Management
The Gatekeeper allows or disallows call traffic within the Gatekeeper’s zone, depending upon established
permissions. The zone might be defined geographically (such as different branch locations), by physical network
connections (a range of IP addresses may comprise a zone, as may a subnet on a particular floor of a building),
or by a functional (organizational) paradigm.
Optional Gatekeeper Functions
The Gatekeeper supports the three main optional Gatekeeper functions: call control signaling, call authorization,
and bandwidth management.
Call Control Signaling
The Gatekeeper can, in “routed” mode, act as an intermediary for H.225 call-control signals between two
endpoints participating in a call. In “direct” mode, this function is turned off and the endpoints exchange H.225
call-control messages directly.
Call Authorization
The Gatekeeper can be programmed to restrict access (admission and registration) according to criteria set by
the user.
Bandwidth Management
This is essentially dynamic bandwidth control (see “Bandwidth Control” section above).

Chapter 1 – Introduction and Description
Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 6
Features
•H.323 Version 2 compliance
•Admissions control determines whether H.323 devices are allowed to access resources (make calls)
•Address translation routes calls across your network
•Bandwidth control monitors and controls H.323 bandwidth usage to provide superior QoS
•Zone control and managemnt provides all defined call control services to all registered endpoints in the
gatekeeper’s zone
•Bandwidth management controls and limits the number of H.323 devices that are allowed to simultaneously
use the network
•Call routing allows you to direct calls to specified groups of gateways
•Call authorization/access authorizes or rejects a given call based on type of service, gateway restrictions or
lack of available bandwidth
•Support for Zone Prefix 1 and 2 where we accept calls from neighbouring gatekeepers (Inter Zone Calls)
using these two zone prefixes
•Intra-zone security mechanism to control calling activity within a zone using PBX-like prefix dialing
•Support for non-RAS endpoints such as Microsoft NetMetting

Chapter 1 – Introduction and Description
Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 7
Front Panel
The front panel has 4 front panel LEDs that provide operating status.
The Front Panel
Figure 1-2. Front Panel
Front Panel LED Descriptions
LED
Power Indicates the presence of power.
Boot After power up, the Boot LED will be on briefly while the Gatekeeper is booting. It lights whenever the
Gatekeeper is booting or downloading a set of configuration data.
LED Description of Ethernet LEDs
LNK The LINK (LNK) LED indicates link integrity for the Ethernet port. When the LNK LED is on, the
Ethernet link is valid. When the LNK LED is blinking, the Ethernet link is active.
FDX The Full DupleX (FDX) LED indicates either 10Mbps, 100Mbps, or a collision has occurred on the
Ethernet link. When the FDX LED is off, the Ethernet link is responding at 10Mbps. When the FDX
LED is on, the link is responding at 100Mbps. When the FDX LED is blinking, a collision has
occurred.

Chapter 1 – Introduction and Description
Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 8
Back Panel
The Gatekeeper back panel has a power plug, power switch, Command Port (RS232) for configuration, an
Ethernet jack (RJ45) for connection to your network, and a Command Modem for remote configuration.
Back panel
The back panel components are described in detail in the Cabling Procedure section in Chapter 2 of this manual.
Specifications
The Gatekeeper conforms to the following technical specifications.
• 10/100Mb EtherNet network
• Power requirement: 100-240V; 1.2 – 0.6V
• Frequency: 50-60 Hz
• Power Consumption: 27 Watts
• 1.75 inches high x 17.4 inches wide x 8.75 inches deep (4.5cm H x 44.2cm W x 22.2cm D)
• 7.1 lbs (3.2 kg)

Chapter 2 – Installation
Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 9
Chapter 2 - Installation
This chapter explains how to set up and connect cables for the Gatekeeper. This product includes the Windows
operating system and Gatekeeper software, and is ready to be connected to an Ethernet concentrator.
Safety Warnings
1. Use this product only with UL- and CUL-listed computers.
2. To reduce the risk of fire, use only 26 AWG or larger telephone wiring.
3. Never install telephone wiring during a lightning storm.
4. Never install a telephone jack in a wet location unless the jack is specifically designed for wet locations.
5. Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected
at the network interface.
6. Use caution when installing or modifying telephone lines.
7. Avoid using a telephone during an electrical storm; there is a risk of electrical shock from lightning.
8. Do not use a telephone in the vicinity of a gas leak.
Caution: Danger of explosion if battery is incorrectly replaced. A lithium battery on the Gatekeeper board
provides backup power for the time-keeping capability. The battery has an estimated life expectancy of ten years.
Contact Multi-Tech if you suspect a failed battery. If date and time is incorrect after having the unit powered off, it
may be due to a weak battery or incorrect setup.
Caution: The Ethernet ports are not designed to be connected to a Public Telecommunication Network.
Safety Recommendations for Rack
Installations
•Ensure proper installation of the Gatekeeper in a closed or multi-unit enclosure by following the
recommended installation as defined by the enclosure manufacturer. Do not place the Gatekeeper directly
on top of other equipment or place other equipment directly on top of the Gatekeeper.
•If installing the Gatekeeper in a closed or multi-unit enclosure, ensure adequate airflow within the rack so
that the maximum recommended ambient temperature is not exceeded.
•Ensure that the Gatekeeper is properly connected to earth ground via a grounded power cord. If a power
strip is used, ensure that the power strip provides adequate grounding of the attached apparatus.
•Ensure that the main supply circuit is capable of handling the load of the Gatekeeper. Refer to the power
label on the equipment for load requirements.
•Maximum ambient temperature for the Gatekeeper is 40 degrees Celsius (104°F).
This equipment should only be installed by properly qualified service personnel.
•Connect like circuits. In other words, connect SELV (Secondary Extra Low Voltage) circuits to SELV circuits
and TN (Telecommunications Network) circuits to TN circuits.

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Unpacking
Check the items on the Gatekeeper shipping list to ensure that you have received the correct options and
accessories. Unpack the unit and inspect it for visible shipping damage. If damage is observed, do not power-on
the unit; contact Multi-Tech's Tech Support for advice. If no damage is observed, place the Gatekeeper in its final
location.
Cabling
Cabling your Gatekeeper entails making the proper connections for power, command port, and Ethernet network.
Figure 2-1 shows the back panel connectors and the associated cable connections. The following procedure
details the steps necessary for cabling your Gatekeeper.
1. Connect the power cord to a live AC outlet, then connect it to the Gatekeeper’s power receptacle shown at
top right in Figure 2-1.
Figure 2-1. Cabling
2. Connect the Gatekeeper to the PC (the computer that will hold the Gatekeeper software) using the RJ-45 to
DB9 (female) cable provided with your unit. Plug the RJ-45 end of the cable into the Command port of the
Gatekeeper and connect the other end (the DB9 connector) to the PC serial port you are using (typically
COM1 or COM2).
3. Connect a network cable to the Ethernet connector on the back of the Gatekeeper. Connect the other end
of the cable to your network.
4. If you intend to configure the Gatekeeper remotely using the Gatekeeper Windows GUI, connect an RJ-11
phone cable between the Command Modem connector (at the rear of the Gatekeeper) and a receptacle
served by a telco POTS line. See Figure 2-2

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Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 11
The Command Modem is built into the Gatekeeper unit. To configure the Gatekeeper remotely using its Windows
GUI, you must call into the Gatekeeper’s Command Modem. Once a connection is made, the configuration
process is identical to local configuration with the Windows GUI.
Figure 2-2. GND & Remote Config Modem Connections
5. Ensure that the unit is properly connected to earth ground by verifying that it is reliably grounded when
mounted within a rack.
This can be accomplished by connecting a grounding wire between the chassis grounding screw (see
Figure 3-9) and a metallic object that will provide an electrical ground.
6. Turn on power to the Gatekeeper by setting the power switch on the right side panel to the ON position.
Wait for the Boot LED on the Gatekeeper to go off before proceeding. This may take a couple of minutes.
Proceed to Loading Gatekeeper Software section.

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Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 12
Loading Gatekeeper Software
The software loading procedure does not present every screen or option in the loading process. It is assumed
that someone with a thorough knowledge of Windows and the software loading process is performing the
installation.
The MultiVOIP Gatekeeper software and User Guide are contained on the Gatekeeper product CD. Because the
CD is auto-detectable, it will start up automatically when you insert it into your CD-ROM drive. When you have
finished loading your Gatekeeper software, you can view and print the User Guide by clicking on the View
Manuals icon.
1. Be sure that your Gatekeeper has been properly cabled and that the power is turned on.
2. Insert the Gatekeeper CD into your CD-ROM drive. The CD should start automatically. It may take 10 to
20 seconds for the MultiVOIP Gatekeeper MVP100GK AutoRun screen to display.
If the AutoRun screen does not display automatically, click My Computer, then right click the CD ROM
drive icon, click Open, and then click the Autorun icon.
3. When the AutoRun screen appears, click the Install Software icon.

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Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 13
4. A ‘Thank you for choosing..’ screen appears.
Press Enter or click Next to continue.
5. Follow the on-screen instructions to install your Gatekeeper software. The first screen asks you to choose
the folder location of the files of the Gatekeeper software.
Choose a location and click Next.

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Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 14
6. At the next screen, you must select a program folder location for the Gatekeeper software program icon.
Click Next. Transient progress screens will appear while files are being copied.
7. On the next screen you can select the COM port that the command PC will use when communicating with
the Gatekeeper unit. After software installation, the COM port can be re-set in the Gatekeeper Software
(from the sidebar menu, select Connection | Settings to access the COM Port Setup screen or use the
keyboard shortcut Ctrl + G).

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Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 15
NOTE: If the COM port setting made
here conflicts with the actual COM
port resources available in the
command PC, this error message will
appear when the Gatekeeper program
is launched. If this occurs, you must
reset the COM port.
To change the COM port setting, use the COM Port Setup dialog box, which is accessible via the keyboard
shortcut Ctrl + G or by going to the Connection pull-down menu and choosing “Settings.” In the “Select
Port” field, select a COM port that is available on the PC. (If no COM ports are currently available, re-
allocate COM port resources in the computer’s MS Windows operating system to make one available.)
8. A completion screen will appear.
Click Finish.
When setup of the Gatekeeper software is complete, you will be prompted to run the Gatekeeper software
to configure the VOIP.
Software installation is complete at this point.

Chapter 2 - Gatekeeper Configuratrion
Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 16
Gatekeeper Configuration
Three methods of configuring a Gatekeeper can be used; 1) Local configuration, 2) Remote configuration through
the command modem, or 3) Web-browser configuration. Also determining the configuration method is where the
Gatekeeper network is located. If the Gatekeeper’s network is within the contential United States, the Gatekeeper
can be configured either using local configuration, where a PC is connected to the Command Port on the
Gatekeeper or remotely using the internal Command Modem connected to a dial up line and a remote PC
connected to a dial up line.
If the Gatekeeper’s network is outside the contential United States, then a minimual local configuration needs to
be accomplished, that is the Regional Parameters have to be set for the internal Command Modem. Then the
Gatekeeper could be shipped to its site, connected to its network, the internal Command Modem connected to a
dial up line, and then the configuration process could be finished using remote configuration.
Web-browser configuration can be used after the Gatekeeper’s IP address has been set.
Gatekeeper local configuration begins with the following procedure. If you are remotely configuring the
Gatekeeper through the command modem and the Gatekeeper’s network is within the contential US, you can skip
to the Remote Configuration procedure. If the Gatekeeper’s network is outside the contential US, you will have to
perform the local configuration procedure setting up the Regional Parameters and then you could proceed with
Remote Configuration through the command modem. If you want to use the Web-browser for configuration, you
will have to perform the local configuration setting up the Gatekeeper’s IP address. Then you can use the Web-
browser.
1. Start Gatekeeper Configuration Program. Launch the Gatekeeper program from the Windows Start |
Programs |Gatekeeper X.XX (Version number) |Configuration and click .
2. The Gatekeeper main screen appears. If the main screen appears grayed out and seems inaccessible, verify
command port connection.
In the lower left corner of the screen, the connection status of the Gatekeeper will be displayed. The
messages in the lower left corner will change as detection occurs. The message “Gatekeeper Found”
confirms that the Gatekeeper is in contact with the Gatekeeper configuration program.

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Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 17
Regional Parameters
If you are going to continue with the local configuration of the Gatekeeper and don’t plan to remotely access the
Gatekeeper through the command modem, you do not have to consider the Regional Parameters. Skip the
Regional Parameters and continue on with the setting of the Gatekeeper’s IP Address in the next section.
If you would like to configure the Gatekeeper once it is connected into the network that it is going to be used in,
you need to consider the Regional Parameters. If the Gatekeeper is being used in the United States, the default
parameter setting, the Regional Parameter does not have to be changed.
If the Gatekeeper is being used in any other country/region, the Regional Parameters have to be changed to that
country/region’s requirements.
Modem Configuration
Before you can remotely configure the Gatekeeper, the Command Modem on the Gatekeeper has to be
connected to a dial up line, the phone number of that dial up line has to be known by the person configuring the
Gatekeeper remotely. The following modem configuration procedure provides you with the steps necessary to
connect the command modem to a dial up line once the Gatekeeper is connected to its network, the Gatekeeper
software loaded on the PC, and the dial up connection is established.
1. Once the Gatekeeper is connected to its network, connect an RJ-11 phone cable between the Command
Modem connector on the back panel of the Gatekeeper and a telephone jack that is connected telephone
line.
2. Find out the telephone number of this connection so that the person configuring the remote PC can enter
this phone number into the Dial String on the Com Port Setup screen.
3. Now, all activity is from the remote PC. Connect the remote PC to a dial up line.
4. Load the Gatekeeper software on the remote PC.
5. From your desktop, click on StartProgramsMultiVOIP Gatekeeper x.xx (x.xx is version number)
Configuration Port Setup and the COM Port Setup screen is displayed.

Chapter 2 - Gatekeeper Configuratrion
Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 18
6. Set the COM Port Setup Select Port and Baud Rate settings to match the communications port settings
of your local PC.
7. Enter the Gatekeeper’s Command Modem phone number in the Dial String window of the Modem Setup
preceeded by the AT dial command (atdt).
8. Click the OK button and the dialing sequence begins. The Reading Setup dialog box is displayed and
then the main Gatekeeper screen is displayed. This is the main screen of the remote Gatekeeper.
9. Click on Configuration|IP and you are ready to move to setting the IP address of the Gatekeeper.
Continue to the next section for setting the IP address.

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Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 19
Set IP Parameters
From the Main Gatekeeper screen, click on Configuration|IP. In each field, enter the values that fit your
particular network.
1. Diff Serv Parameters group’s values pertain to a differential prioritizing system for IP packets as handled
by Diff Serv-compatible routers. The Call Control PHB (Per Hop Behavior) value prioritizes call setup IP
packets. The Voip Media PHB value prioritizes the RTP/RTCP audio IP packets. Before changing these
default values, consult with a qualified IP telecommunications engineer or refer to the TCP/IP standards
described in the Gatekeeper Software Chapter 5, Configuration IP Parameters section of this User Guide.
2. Enter the IP address of your network in the IP Address window.
3. Enter the IP Mask address for your network in the IP Mask window.
4. If a gateway device connects the Gatekeeper to the Internet, enter the gateway’s IP address in the
Gateway window.

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Multi-Tech Systems, Inc. MultiVOIP Gatekeeper User Guide 20
Change Gatekeeper Name.
From the Main Gatekeeper screen, click on Gatekeeper|Parameters and the Network Parameters screen is
displayed
1. In the GK-ID window change the default Gatekeeper name -MVP_SGK to your Gatekeeper name.
2. Click OK to save your new Gatekeeper name.
Web-browser Configuration
In most aspects of configuration, the Web-browser and Windows GUI differ only graphically, not functionally. The
Web-browser version number has to be at least 6 for Internet Explorer and Netscape. The Java Plug in on the
CD has to be loaded on to the PC using the Web-browser. Java is needed to support drop-down menus and
multiple windows in the Web-browser.
The initial configuration of assigning the Gatekeeper’s IP address has to be done locally. Once the IP address is
assigned, then a PC on the same network and sub-net can access the Gatekeeper using a Web-browser. The
primary advantage of the Web-browser is remote access to a Gatekeeper.