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 environment. 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.
MultiDSU User Guide 82083200 Revision A Model MTT1DSU 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.
Contents Chapter 1 - Introduction and Description Introduction ................................................................................. 8 About This User Guide ................................................................ 9 Front Panel ................................................................................ 10 Back Panel ............................................................................... 11 LINE Connector ..................................................................
Set and Save Configurations .............................................. 33 Reset to Factory Defaults ................................................... 34 Current Status Screen ........................................................ 34 Statistics .................................................................................. 35 Out Of Sync Secs .............................................................. 35 Errored Secs ......................................................................
Chapter 1 - Introduction and Description
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.
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.
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.
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 Winchestertype 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.
FCC Regulations for Telephone Line Interconnection 1.This equipment complies with Part 68 of the Federal Communications Commission (FCC) rules. On the outside surface of this equipment is a label that contains, among other information, the FCC registration number and ringer equivalence number (REN). If requested, this information must be provided to the telephone company. 2. As indicated below, the suitable jack (Universal Service Order Code connecting arrangement) for this equipment is shown.
necessary modifications in order to maintain uninterrupted 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.
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.
Chapter 2 - Installation
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.
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 1 ® ech TSystems PC Router PC Workstation Server Data Port MultiDSU (Master) RJ48 back-to-back connection (with T1 crossover cable) Data Port MultiDSU (Slave) ® ech TSystems Server PC Router PC Workstation LAN 2 Figure 2-2.
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 connectors and associated cable connections, and Table 2-1 contains the procedures for connecting the cables to your MultiDSU. LINE COMMAND POWER 1 0 Power Connection To Telco or Slave MultiDSU (back to back) Device Connection PC Connection Figure 2-3. Cable Connections Table 2-1.
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.
Configuration If you are connecting to a Telco, get the following T1 information from your Telco : Line Code: AMI/B8ZS__________________________________ Framing Format: D4/ESF________________________________ Available bandwidth: Full T1 (24 DS0s), or Number of DS0s and which DS0 assignments, if FT1. _________ If you are using your MultiDSU as a short-haul modem, select the identical line coding and framing format to be used in both units. Power up a terminal or PC running communications software.
3. Enter option 1 and press the ENTER key to display the T1 Line Configuration menu with options for Framing Format, Line Coding, and Line Type and Length. T1 Line Configuration 1. Framing Format 2. Line Coding 3.
Line Coding 1. Alternate Mark Inversion (AMI) 2. Binary 8 Zero Substitution (B8ZS) Enter Selection (-(previous), q(uit), <1>): _ Enter option 2 and press the ENTER key if you need to switch from the default AMI to B8ZS. You will then see the new selection displayed on the T1 Line Configuration menu. c. Enter option 3 and press the ENTER key to display the eight available selections for Line Type and Length. Line Type and Length 1. 2. 3. 4. 5. 6. 7. 8.
Configurations 1. 2. 3. 4. 5. 6. 7. T1 Line Configuration DS0 Speed/DS0 Allocation Clocking V.35 Port Set configurations Set and Save configurations Reset to Factory Defaults Enter Selection (-(previous), q(uit), <1>): _ 5. At the Configurations menu, enter option 2 and press the ENTER key to display the DS0 Speed/DS0 Allocation menu. DS0 Speed/DS0 Allocation 1. DS0 Speed 2. DS0 Allocation : 64Kbps : 1-24 Enter Selection (-(previous), q(uit), <1>): _ 6.
Configurations 1. 2. 3. 4. 5. 6. 7. T1 Line Configuration DS0 Speed/DS0 Allocation Clocking V.35 Port Set configurations Set and Save configurations Reset to Factory Defaults Enter Selection (-(previous), q(uit), <1>): _ 9. At the Configurations menu, enter option 3 and press the ENTER key to display the current selection (Internal, Line, or External). If you want to change to one of the other selections, press the ENTER key to display the three options.
10. At the configurations menu, enter option 4 and press the ENTER key to display the RTS/DTR menu associated with the V.35 Data Port. V.35 Port 1. Force RTS : Independent Enter Selection (-(previous), q(uit), <1>): _ 11.To toggle RTS from "Independent" to "Forced," enter option number 1, then press the ENTER key and select 2 (for Forced) and press the ENTER key. You will then see the updated V.35 Port menu.
T1 DSU Main Menu 1. 2. 3. 4. 5.
Chapter 3 - Menu System
Introduction The menu system for the MultiDSU provides a set of user-friendly configuration menus that are accessible from a main menu. The Main Menu contains four options that enable you to configure your MultiDSU, check the current operating status, display hourly and daily statistics, or run diagnostic tests; you can also exit (quit) the command mode from the Main Menu. T1 DSU Main Menu 1. 2. 3. 4. 5.
T1 Line Configuration 1. Framing Format 2. Line Coding 3. Line Type and Length : D4 Superframe : Alternate Mark Inversion (AMI) : CSU (0db) or DSX-1 (0-133ft) Enter Selection (-(previous), q(uit), <1>): _ Framing Format The MultiDSU supports two types of framing formats: D4 Superframe (D4) and Extended Superframe (ESF). The D4 Superframe option (option 1) is a 193-bit frame format in which the 193rd bit has framing and signaling information. A D4 superframe consists of 12 frames.
Line Type and Length The line type and line length options enable the user to configure the MultiDSU to match the characteristics of the T1 line. The default selection is CSU (0db) or DSX-1 (0-133ft). CSU is a long haul line type that allows the DSX-1 signal to be transmitted up to 6000 ft at Line Build Out (LBO) options of 0 dB, -7.5 dB, -15 dB, or -22.5 dB. If the line type is DSX-1, you can select any of 5 available ranges of line length up to 655 ft, maximum.
Clocking Menu This menu enables you to select the clock timing (Internal, Line, or External) for the MultiDSU. If you are connecting to a Telco, choose option 2, "Line." For a back-to-back setup, set one unit for Internal (option 1) (or External, option 3, if your DTE is providing the 1.544 MHz clock) and set the other unit for Line (option 2). Clocking 1. Internal 2. Line 3. External Enter Selection (-(previous), q(uit), <1>): _ V.35 Port Menu Selecting option 4 on the Configurations menu displays the V.
menu. Once they are saved, these settings will be retained if the MultiDSU happens to lose power or is turned Off. Reset to Factory Defaults The Configurations menu also enables you to reset the MultiDSU to the factory defaults by selecting option 7 and pressing the ENTER key. Current Status Screen Selecting option 2 on the Main Menu displays the Current Status screen which displays the line status, receive level range, and the number of bipolar violations, framing bit errors, and out-of-sync multiframes.
Statistics Selecting option 3 on the Main Menu displays the Statistics. This screen enables you to view any of eight different types of hourly or daily statistics. The Hourly Statistics are displayed first, followed by the Daily Statistics. From these performance data you can produce reports for the previous 24 hours in 15-minute increments.
Bursty Errored Secs Bursty Errored Seconds (BES) are seconds containing 2 to 319 CRC6 errors. Severely Errored Secs Severely Errored Seconds (SES) are seconds with 320 or more CRC6 errors. Failed Secs Failed Seconds are seconds that failed due to one or more errors. Controlled Slips Controlled Slips (CS) occur when the receiving device either replicates or deletes a DS1 frame.
Diagnostics Selecting option 4 on the Main Menu opens the Diagnostics screen, with options for the various types of loopback tests that can be performed when a T1 crossover cable is connected between the LINE jacks on two MultiDSUs. The loopback tests are discussed in detail in Chapter 5 - Diagnostics. Diagnostics 1. 2. 3. 4. 5. 6.
System Information Selecting option 5 on the Main Menu opens the System Information screen, which displays the firmware version number. System Information Firmware Version Press to continue: _ 38 : Version 1.
Chapter 4 - Remote Configuration
Introduction Remote configuration of the MultiDSU involves using modems to communicate from the local PC or terminal to the remote MultiDSU, where a special Remote Configuration Cable is used to link the receiving modem to the Command port of the MultiDSU. Modem-Based Remote Configuration Procedure 1. At the remote site, connect a special cable (Remote Configuration Cable) to the Command port jack on the back panel of the MultiDSU and the RS232 connector on the modem.
Chapter 5 - Diagnostics
Introduction MultiDSU diagnostics involve using the Diagnostics menus that are accessible through option 4 on the Main Menu. Option 4 opens the Diagnostics Menu that enables you to run loopback diagnostic tests on the MultiDSU and its connecting lines. Setup for Diagnostic Loopback Tests Connect a T1 crossover cable between the LINE jacks on two MultiDSUs. On the T1 Line Configuration menu, set up both units for the identical framing format (option 1) and line coding (option 2).
Diagnostics Menu The Diagnostics menu enables you to run (and end) any of four different loopback tests, return to the previous menu, or exit (quit) the command mode. Diagnostics 1. 2. 3. 4. 5. 6.
Remote Loopback Mux MultiDSU T1 Line Mux Remote MultiDSU Figure 5-2. Remote Loopback Test Processor Loopback This test (option 3 on the Diagnostics menu) loops back the data in the MultiDSU's Central Processor Unit (CPU) and assures that the CPU and the T1 transceiver are communicating correctly. See Figure 5-3. Processor Loopback Mux MultiDSU T1 Line Mux Remote MultiDSU Figure 5-3.
Chapter 6 - Warranty, Service and Technical Support
Introduction This chapter starts out with statements about your MultiDSU 2-year warranty. The next section, Tech Support, should be read carefully if you have questions or problems with your MultiDSU. It includes the technical support telephone numbers, space for recording your product information, and an explanation of how to send in your MultiDSU should you require service. The final sections explain how to use our bulletin board service (BBS), and get support through the Internet.
On-line Warranty Registration If you would like to register your MultiDSU electronically, you can do so at the following address: http://www.multitech.com/register/ Service If your tech support specialist decides that service is required, your MultiDSU may be sent (freight prepaid) to our factory. Return shipping charges will be paid by Multi-Tech Systems. Include the following with your MultiDSU: • a description of the problem. • return billing and return shipping addresses.
About the Internet Multi-Tech is a commercial provider on the Internet. If you prefer to receive service via the internet, you can contact Tech Support via e-mail at the following address: http://www.multitech.com/support Multi-Tech's presence includes a Web site at: http://www.multitech.com and an ftp site at: ftp://ftp.multitech.com About the Multi-Tech Fax-Back Service Multi-Tech’s fax-back system provides 24-hour access to sales, marketing, and technical literature.
Appendixes
Appendix A - Cabling Diagrams Command Port Cable COMMAND 12345678 PIN NO. To COMMAND Port Jack PIN NO. 1 20 Data Terminal Ready (DTR) 2 2 Transmit Data (BA) To DTE Device 3 3 Receive Data (BB) 4 4 Request To Send (RTS) (Terminal Device; e.g., ASCII Terminal or PC) 5 5 Clear To Send (CTS) 6 6 Data Set Ready (DSR) 7 7 Signal Ground (AB) 8 Carrier Detect (CD) 1 Chassis Ground 8 .
Data Cable V.35 34-PIN CONNECTOR Chassis Ground Request To Send Data Set Ready Data Terminal Ready Send Data (A) Send Data (B) Terminal Timing (A) Terminal Timing (B) Send Timing (A) Send Timing (B) C H M S W AA EE KK A E K P U Y CC HH MM D J N T X BB FF LL B F Signal Ground Clear To Send Data Carrier Detect L R V Receive Data (A) Receive Data (B) Receive Timing (A) Receive Timing (B) Z DD JJ NN As viewed from the connector side (rotated clockwise 90 degrees).
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