Multitech MultiDSU MTT1DSU User manual

Model MTT1DSU
User Guide

Class A
Manual Declaration
NOTE: This equipment has been tested and found to comply with the
limits for a Class A digital , pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environ-
ment. This equipment generates, uses, and can radiate radio frequency
energy, and if not installed and used in accordance with the User
Guide, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause
harmful interference, in which case the user will be required to correct
the interference at his own expense.
WARNING: Changes or modifications to this unit not expressly approved
by the party responsible for compliance could void the user's authority
to operate this equipment.

MultiDSU User Guide
82083200 Revision A
ModelMTT1DSU
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 © 1998, by Multi-Tech Systems, Inc.
Multi-Tech Systems, Inc. makes no representations or warranties 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.
RecordofRevisions
Revision Description
AManual released. All pages at rev A.
(8/14/98) Patents
This Product is covered by one or more of the following U.S. Patent
Numbers: 5.301.274; 5.309.562 ; 5.355.365; 5.355.653; 5.452.289;
5.453.986 . Other Patents Pending.
TRADEMARK
Trademark of Multi-Tech Systems, Inc. is the Multi-Tech logo.
Windows is a registered trademark of Microsoft.
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, Minnesota 55112
[phone] or [phone]
Fax [phone]
Tech Support [phone]
BBS [phone] or [phone]
Internet Address: http://www.multitech.com
Fax-Back [phone]

iv
Contents
Chapter 1 - Introduction and Description
Introduction ................................................................................. 8
AboutThisUserGuide ................................................................ 9
FrontPanel................................................................................ 10
BackPanel ............................................................................... 11
LINEConnector .................................................................. 11
COMMANDConnector........................................................ 11
DataConnector................................................................... 11
POWERConnector............................................................. 11
FCCRegulations forTelephoneLine Interconnection ................. 12
Specifications ........................................................................... 14
T1Line ............................................................................... 14
DataPort ............................................................................ 14
Electrical/Physical/Environmental ...................................... 14
Chapter 2 - Installation
Introduction ............................................................................... 16
SafetyWarnings ........................................................................ 16
Unpacking................................................................................. 16
MultiDSUConfiguration ............................................................. 17
CablingYourMultiDSU .............................................................. 19
Configuration............................................................................. 21
Chapter 3 - Menu System
Introduction ............................................................................... 30
ConfigurationsMenu ........................................................... 30
T1Line ConfigurationMenu....................................................... 30
FramingFormat .................................................................. 31
LineCoding ........................................................................ 31
LineTypeandLength .......................................................... 32
DS0Speed/DS0AllocationMenu.............................................. 32
DS0Speed ......................................................................... 32
DS0Allocation.................................................................... 32
ClockingMenu .......................................................................... 33
V.35 Port Menu ......................................................................... 33
SetConfigurations .............................................................. 33

v
SetandSaveConfigurations .............................................. 33
Reset to Factory Defaults ................................................... 34
CurrentStatusScreen ........................................................ 34
Statistics .................................................................................. 35
Out Of Sync Secs .............................................................. 35
ErroredSecs ...................................................................... 35
Bursty Errored Secs ........................................................... 36
SeverelyErroredSecs........................................................ 36
FailedSecs ........................................................................ 36
ControlledSlips .................................................................. 36
FramingBitErrors............................................................... 36
Bipolar Violations ................................................................ 36
Diagnostics ............................................................................... 37
SystemInformation................................................................... 38
Chapter 4 - Remote Configuration
Introduction ............................................................................... 40
Modem-BasedRemoteConfigurationProcedure................. 40
Chapter 5 - Diagnostics
Introduction ............................................................................... 42
SetupforDiagnosticLoopbackTests ........................................ 42
DiagnosticsMethodology .......................................................... 42
DiagnosticsMenu ..................................................................... 43
Local Loop Back................................................................. 43
RemoteLoopBack ............................................................. 43
Put Remote Into Loop Back................................................ 44
Processor Loopback.......................................................... 44
Chapter 6 - Warranty, Service and Technical Support
Introduction ............................................................................... 46
LimitedWarranty ................................................................. 46
On-lineWarrantyRegistration.............................................. 47
Service ............................................................................... 47
AbouttheInternet............................................................... 48
AbouttheMulti-Tech Fax-Back Service .............................. 48

Chapter 1 - Introduction
and Description

8
Introduction
The Multi-Tech Systems MultiDSU (Model number MTT1DSU) is a low
cost, full-featured T1-FT1 Data Service Unit (DSU). The MultiDSU
provides an interface between point-to-point T1 or Fractional T1 service
and the end user's Data Terminal Equipment (DTE). This unit also
provides Facility Data Link (FDL) support.
Housed in a compact, durable housing, the MultiDSU supports D4 or
ESF framing and AMI or B8ZS line coding on the T1 Line and supports
synchronous data rates from 56 kbps to 1.536 Mbps to the DTE. A
single V.35 (Winchester 34-pin) physical interface is the Data port to the
DTE device.
This unit enables you to run complete diagnostics (loopback tests on
your T1 line or your local or remote DSU) from your PC or terminal.
Figure 1-1. MultiDSU

9
About This User Guide
This user guide describes the MultiDSU and explains how to install and
configure the unit. The information contained in each chapter is as
follows:
Chapter 1 - Introduction and Description
Chapter 1 describes the MultiDSU and provides a review of this user
guide. This chapter describes the front panel indicators and back panel
connectors and switch. Applicable FCC regulations and a list of relevant
specifications are provided at the end of the chapter.
Chapter 2 - Installation
Chapter 2 lists the safety warnings that are applicable to the MultiDSU
then steps you through the process of unpacking your MultiDSU,
connecting signal cables and power, and configuring your MultiDSU for
operation.
Chapter 3 - Menu System
Chapter 3 describes the various options available on all the menus and
submenus used to configure and operate the MultiDSU.
Chapter 4 - Remote configuration
This chapter provides instructions for modem-based remote configura-
tion of the MultiDSU.
Chapter 5 - Diagnostics
Chapter 5 describes how to set up for, and perform, several types of
diagnostic loopback tests for the MultiDSU.
Chapter 6 - Warranty, Service and Technical Support
Chapter 6 provides instructions on getting service for your MultiDSU at
the factory, and includes a statement of the limited warranty and space
for recording information about your MultiDSU prior to calling Multi-
Tech's Technical Support. The final sections explain how to obtain
technical support through our Web site and ftp site on the Internet or our
fax-back system.

10
Front Panel
The front panel contains three sets of LEDs that provide the status of
the MultiDSU and its data and T1 connections. The Data LEDs display
the status and activity of the V.35 Data port. The T1 Line LEDs show
whether the T1 Line is online or in a failure mode. Two monitor jacks
enable you to monitor the T1 line with external test equipment.
Figure 1-1. Front Panel
PWR (Power) Lights when the power switch is in the "1"
(On) position and the MultiDSU is powered by the
external power supply.
BTG (Booting) Lights while the MultiDSU is booting.
TST (Test) Lights during diagnostic tests and during any
loopback tests. Data
XMT (Transmit) Lights when packets are being transmitted
to the T1 line from the DTE device.
RCV (Receive) Lights when packets are being received
from the T1 line by the DTE device.
RTS (Ready to Send) Lights whenever the DTE device is
receiving RTS.
T1 Line
ONL (Online) Lights whenever a carrier signal is detected
and no error conditions are present.
SLS (Sync Loss) Lights when there is a Loss of Sync in the
input signal .
RED (Warning) Lights when there is a red alarm on the T1
line.
YEL (Warning) Lights when there is a yellow alarm on the
T1 line. Monitor jacks
XMT (Transmit) monitors transmit data on the T1 line.
RCV (Receive) monitors receive data on the T1 line.

11
Back Panel
All the cable connections for the MultiDSU are made at the back panel.
The Line connector enables the MultiDSU to be connected to a T1 line
from the local Telco central office (CO). The Command connector is used
to configure the MultiDSU using a PC or terminal. The V.35 Winchester-
type Data connector is connected through an adapter cable to a
synchronous communications device such as a router. The power
connector connects the external power supply to the MultiDSU. The
back panel connectors are shown in Figure 1-2 and defined in the
following sections.
LINE COMMAND POWER
0
1
RJ45 Jack Power Connector:
6-pin Circular DIN
Data Connector
On/Off
Switch
RJ48 Jack
Figure 1-2. Back Panel
LINE Connector
The RJ48 Line jack is used to connect to a point-to-point T1 line from
your local Telco or back to back to the Line jack of another MultiDSU.
COMMAND Connector
The RJ45 Command jack is used to connect the MultiDSU to a terminal
or a PC operating in terminal mode, for configuration purposes.
Data Connector
The V.35 Data connector is connected to a synchronous communica-
tions (DTE) device such as a router.
POWER Connector
The Power connector is used to connect the external wall type trans-
former power supply to the MultiDSU. The wall transformer plugs
directly into a grounded duplex AC outlet.

12
FCC Regulations for Telephone Line Interconnection
1.This equipment complies with Part 68 of the Federal
CommunicationsCommission(FCC) rules. On the outside
surface of this equipment is a label that contains, among other
information,theFCCregistrationnumberandringer equivalence
number (REN). If requested, this information must be provided to
thetelephonecompany.
2. As indicated below, the suitable jack (Universal Service Order
Codeconnecting arrangement) for thisequipmentisshown. If
applicable, the facility interface codes (FIC) and service order
codes(SOC)areshown. An FCC-compliant telephone cord and
modular plug is provided with this equipment.This equipment is
designed to be connected to the telephone network or premises
wiring using a compatible modular jack which is Part 68
compliant. See installation instructions for details.
3. The ringer equivalence number (REN) is used to determine the
number of devices which may be connected to the telephone
line. Excessive REN’s on the telephone line may result in the
devices not ringing in response to an incoming call. In most, but
not all areas, the sum of the REN’s should not exceed five (5.0).
To be certain of the number of devices that may be connected
to the line, as determined by the total REN’s, contact the
telephone company to determine the maximum REN for the
callingarea.
4. If this equipment causes harm to the telephone network, the
telephone company will notify you in advance. But if advance
notice isn’t practical, the telephone company will notify the
customer as soon as possible.Also, you will be advised of your
right to file a complaint with the FCC if you believe it is
necessary.
5. The telephone company may make changes in its facilities,
equipment, operations, or procedures that could affect the
operation of the equipment. If this happens, the telephone
company will provide advance notice in order for you to make

13
necessarymodifications in order tomaintainuninterrupted
service.
6. If trouble is experienced with this equipment (the model of which
is indicated below) please contact Multi-Tech Systems, Inc. at
the address shown below for details of how to have repairs
made. If the trouble is causing harm to the telephone network,
the telephone company may request you remove the equipment
from the network until the problem is resolved.
7. No repairs are to be made by you. Repairs are to be made only
by Multi-Tech Systems or its licensees. Unauthorized repairs
voidregistrationand warranty.
8. This equipment cannot be used on public coin service provided
by the telephone company. Connection to Party Line Service is
subject to state tariffs. (Contact the state public utility
commission, public service commission or corporation
commission for information.
9. If so required, this equipment is hearing-aid compatible.
Manufacturer: Multi-Tech Systems, Inc.
TradeName: MultiDSU
ModelNumber: MTT1DSU
FCCRegistration#: AU7USA-25529-DE-E
RingerEquivalence: N/A
SOCCodes: 6.0N
ModularJack RJ48 forT1connection
Service Center in USA: Multi-Tech Systems Inc.
2205WoodaleDrive
MoundsView,MN 55112
Voice(612)785-3500or
(800)328-97174
FAX[phone]

14
Specifications
T1 Line
• Single T1 Line port with synchronous data format
• AMI or B8ZS line coding
• D4 Superframe or Extended Superframe framing support
• 1 to 24 channels at 56 kbps or 64 kbps each
• T1 line connector is an RJ48 jack
Data Port
• Single (V.35 DCE) port for synchronous data
• Operation at data rates from 56 kbps to 1.536 Mbps
• Local and remote loopback capability
• Extensive built-in test capabilities
Electrical/Physical/Environmental
• Voltage - 115v AC, 50/60 Hz (for power adapter)
• Power - 10 watts (est.)
• Dimensions - 6" W x 1.625" H x 9.00" L
- 15.24 cm x 4.13 cm x 22.86 cm
• Weight - 2.0 pounds
• Temperature
Operating: - 32° to 122° F (0° to 50° )
Storage: - 4° to 158° F (-20° to 70° )
• Relative Humidity - Up to 95%, non-condensing

Chapter 2 - Installation

16
Introduction
This chapter provides the safety warnings applicable to the MultiDSU
and describes the unpacking of the MultiDSU, cable connections, and
how to configure the unit dependent on your site situation. Once the
MultiDSU is configured, then the Data port can be connected to your
DTE device.
Safety Warnings
1. Never install telephone wiring during a lightning storm.
2. Never install telephone jacks in wet locations unless
the jack is specifically designed for wet locations.
3. Never touch uninsulated telephone wires or terminals unless the
telephone line has been disconnected at the network interface.
4. Use caution when installing or modifying telephone lines.
5. Avoid using a telephone (other than a cordless type) during an
electrical storm. There may be a remote risk of electrical shock
from lightning.
6. Do not use the telephone to report a gas leak in the vicinity of the
leak.
Unpacking
The shipping box contains the MultiDSU, power adapter, Command
port cable, and your user's manual. Inspect the contents for signs of
any shipping damage. If damage is observed, do not power up the unit,
contact Multi-Tech's Technical Support for advice (refer to Chapter 6 -
Warranty, Service and Technical Support). If no damage is observed,
remove all items from the box, place the MultiDSU in its final location,
and connect your cables and power supply.

17
MultiDSU Configuration
Configuring the MultiDSU involves completing all the necessary
connections, including connecting a cable between the MultiDSU and
your DTE device, connecting your PC or terminal to the command port,
connecting the point-to-point T1 line or back-to-back cable and power,
setting up the PC or terminal to configure the MultiDSU, and finally
configuring the MultiDSU using the Configuration procedure provided in
this chapter.
LAN 2
Server
Server PC PC Workstation
T1 Network
T
e
c
h
Systems
®
LAN 1
PC Workstation
PCRouter
MultiDSU Data Port
Data Port
T
e
c
h
Systems
®
Router
MultiDSU
Figure 2-1. CSU Long Haul Application

18
LAN 2
Server
Server PC PC Workstation
T
e
c
h
Systems
®
LAN 1
PC Workstation
PCRouter
MultiDSU Data Port
Data Port
T
e
c
h
Systems
®
Router
MultiDSU
(Slave)
(Master) RJ48
back-to-back
connection
(with T1
crossover
cable)
Figure 2-2. DSX-1 Short Haul Application (0 < 655 Feet)

19
Cabling Your MultiDSU
Cabling your MultiDSU involves making the proper Power, Command
port, Line, and Data port connections. Figure 2-2 shows a typical
application for the MultiDSU. Figure 2-3 shows the back panel connec-
tors and associated cable connections, and Table 2-1 contains the
procedures for connecting the cables to your MultiDSU.
LINE COMMAND POWER
0
1
Device
Connection
Power
Connection
PC
Connection
To Telco
or
Slave MultiDSU
(back to back)
Figure 2-3. Cable Connections
Table 2-1. Cabling the MultiDSU
1. Connect a V.35 interface cable to the Winchester type Data
connector on the back of the MultiDSU. Connect the other end of
the cable to your DTE device (e.g., a router or frame relay access
device). Refer to Appendix A for cable details.
2. Connect the special serial cable's RJ45 connector to the COM-
MAND jack on the back of the MultiDSU, then make sure the other
end of this cable is connected to a serial (COM) port on your
terminal or PC.
3. Connect the T1 line (or back-to-back cable) to the mating RJ48
LINE connector on the back of the MultiDSU.

20
4. Connect the external wall transformer power supply to the
MultiDSU and plug it into a live AC outlet. When power is applied
to the unit and the on/off switch is set to the up ("1" or On) position,
the front panel LEDs will light.
5. Configure the unit in accordance with the procedures in the
Configuration section that follows in this chapter.
6. After the MultiDSU is configured for your application, the Com-
mand cable can be disconnected from the MultiDSU and the
terminal or PC and stored until the next time it is needed.