Model MT202TD 1200 BPS Leased Line Modem User Guide
User Guide MT202TD P/N 82096501 Revision B COPYRIGHT 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© 2000-2001, 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 ......................... 5 Introduction ........................................................................... 5 Description ............................................................................5 Technical Specifications ........................................................ 6 Chapter 2 - Installation and Connection ........................... 8 Introduction ........................................................................... 8 Power ..
Chapter 4 - Warranty, Service, and Technical Support ................................................20 Limited Warranty .................................................................20 Online Warranty Registration ..............................................20 Service ................................................................................ 21 Technical Support ................................................................22 Internet Sites .....................................................
Chapter 1 - Introduction & Description Chapter 1 - Introduction and Description Introduction This manual provides instruction for installing, cabling, operating, and troubleshooting Multi-Tech System’s model MT202TD 1200 bps modem. Description The MT202TD is a low speed asynchronous modem which employs Frequency Shift Keyed (FSK) modulation and works in full duplex over four-wire or in half-duplex over two-wire leased line networks.
MT202TD User Guide Technical Specifications Your MT202TD modem meets the specifications listed below: 6 Model Number MT202TD Data Rate 0–1200 bps Compatibility Western Electric 202 and 202T Data Sets, 202C, 202D, 202E, 202R models Mode of Operation 2-wire half duplex or 4-wire full duplex Line Requirements 2- or 4-wire leased line unconditioned Modulation Frequency Shift Keyed (FSK) Carrier Frequencies Mark:1200Hz; Space: 2200Hz; Soft Carrier: 900Hz Transmit Level -0 dBm Adjustable to -9 d
Chapter 1 - Introduction & Description Interface EIA RS-232C / ITU-T V.
MT202TD User Guide Chapter 2 - Installation and Connection Introduction The installation of the MT202TD consists of setting DIP switches to the appropriate settings and then making the serial, phone line, and electrical power connections. Power Power is supplied to model MT202TD through an AC power transformer. The transformer supplies low voltage DC to the modem and plugs into any conventional 117 VAC, 60 Hz, power outlet. Warning: Use only the power transformer supplied with the modem.
Chapter 2 - Installation & Connection Unpacking the Modem Remove all items from the box. Figure 2-1. Unpacking the MT202TD The packing box contains the following items: l l l l l One MT202TD modem One MT202TD User Guide One power transformer One RJ11/RJ11 cable One RJ11/RJ48 cable If any of these items are missing, please contact Multi-Tech Systems or your dealer/distributor.
MT202TD User Guide Modem LED Indicators MT202TD TD RD CD CTS RTS DSR TM Figure 2-2. LED Display The MT202TD has seven diagnostic LED indicators. They are: 10 TD Transmit Data - This LED blinks when data is being transmitted: on for a space; off for a mark. The state of this LED matches the TD circuit on Pin 2 of the RS232C/V.24 interface. RD Receive Data - This LED blinks when data is being received: on for a space; off for a mark.
Chapter 2 - Installation & Connection Controls on PC Board The MT202TD circuitry is on a single printed circuit (PC) board. This board contains one 8-position DIP switch (numbered 1-8), an analog loopback test switch, and a digital loopback test switch. The factory default setting is for 4-wire, full-duplex operation in normal mode. If you are using the modem in a 2wire configuration or using one of the test modes, you must change the switch positions.
MT202TD User Guide Computer or Terminal Connections Your computer or terminal is connected to the MT202TD via the modem’s EIA RS-232C / ITU-T V.24 interface connector. This connector is a standard interface, with a 25-socket female connection. Therefore, your computer or terminal requires a standard RS-232C / V.24 cable with a male connector on the modem end, and a male or female connector at the computer or terminal end, depending upon the computer or terminal connector. Plug the RS-232C / V.
Chapter 2 - Installation & Connection MT202TD RS-232 Signal Descriptions Pin MTS Circuits Name EIA ITU-T Function Signal Source 2 SD BA 103 Transmitted Data DTE 3 RD BB 104 Received Data DCE 4 RTS CA 105 Request to Send DTE 5 CTS CB 106 Clear to SendDCE 6 DSR CC 107 Data Set Ready DCE 7 SG AB 102 Signal Ground ----- 8 CD CF 109 Data Carrier Detector DCE 9 +V +V ----- Test Voltage DCE DTE= Data Terminal Equipment (terminal or computer) DCE= Data Communications
MT202TD User Guide Modem and Phone Line Connection This section describes how to install and connect the MT202TD. Installation Steps: 1. Verify that the remote modem is set for Bell 202- or 202Tcompatibility. 2. Connect the modem to the leased line jack using one of the two RJ11 cables provided with the modem. 3. Remove the case (see the next page). Verify leased-line transmit level (DIP switch #5) setting is at either 0 dBm (down) or -9 dBm (up).
Chapter 2 - Installation & Connection DIP Switch Settings DIP switches are located on the MT202TD circuit board as shown in Figure 2-3. For information about DIP switch settings and functions, refer to the chart on page 19. To access the switches, remove the modem’s cover. To remove the cover: 1. 2. 3. 4. 5. 6. 7. Unplug the power transformer from the wall socket. Unplug the phone line. Turn the modem upside down. Remove the two screws. Place the modem right side up.
MT202TD User Guide DIP Switch and Switch Settings & Functions (See Figure 2–3.
Chapter 2 - Installation & Connection Leased Line Connections The MT202TD modem operates on leased lines and may be configured in two ways: two-wire or four-wire. In a leased-line application, the line is continuously connected to the modem. In two-wire leased-line applications, only one modem may transmit at a time (this is known as halfduplex). In a four-wire configuration, one pair of wires should connect to the transmitter of the local modem and the receiver of the remote modem.
MT202TD User Guide Chapter 3 - Modem Testing Introduction The MT202TD has two diagnostic tests: Local analog loopback and digital loopback. A loopback test involves entering data from your PC and looping that data through the circuits of your modem and/or a remote modem. When the loop has been completed, the data received on the monitor should match the data entered on the keyboard. The local analog loopback test allows you to verify that the modem’s transmit and receive circuits are functioning properly.
Chapter 3 - Modem Testing 2 for DIP switch setting information). CONNECT UUUUUUUU UUUU Digital Analog Computer or Terminal Local MultiModem Figure 3-3. Local Analog Loopback Test Digital Loopback Test The digital loopback test is an on-line test that loops data sent from one modem across the phone line to another modem, and then back to the first modem. This test checks the phone line and modem integrity. This digital loopback test is used on modems configured for four-wire leased lines.
MT202TD User Guide Chapter 4 - Warranty, Service, and Technical Support Limited Warranty Multi-Tech Systems, Inc., (hereafter MTS) warrants that this product will be free from defects in material or workmanship for a period of two years from date of purchase, or if proof of purchase is not provided, two years from date of shipment. MTS MAKES NO OTHER WARRANTY, EXPRESS OR IMPLIED, AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED.
Chapter 4 - Warranty, Service & Technical Support Service In the event that service is required, products may be shipped, freight prepaid, to our Mounds View, Minnesota, factory. Please send modems that require repairs to the following address: Multi-Tech Systems, Inc. 2205 Woodale Drive Mounds View, MN 55112 Attn: Repairs, Serial #______ A Returned Materials Authorization (RMA) is not required. Return shipping charges (surface) will be paid by MTS.
MT202TD User Guide Technical Support Multi-Tech Systems has an excellent staff of technical support personnel available to help you get the most out of your MultiTech product. If you have any questions about the operation of this modem, please contact us at: Email: Phone: support@multitech.com (800) 972-2439 or (763) 785-3500 (local) Internet Sites Multi-Tech is a commercial provider on the Internet. The Multi-Tech Web site is: http://www.multitech.com The ftp site is: ftp://ftp.multitech.
Appendix Appendix - Regulatory Compliance FCC Part 15 – Class A Statement This equipment has been tested and found to comply with the limits for a Class A digital device, 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.
MT202TD User Guide FCC Part 68 Telecom 24 1. This equipment complies with part 68 of the Federal Communications Commission Rules. On the outside surface of this equipment is a label that contains, among other information, the FCC registration number. This information must be provided to the telephone company. 2. The suitable USOC jack (Universal Service Order Code connecting arrangement) for this equipment is shown below.
Appendix 6. 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 necessary modifications in order to maintain uninterrupted service. 7. If trouble is experienced with this equipment (the model of which is indicated below) please contact Multi-Tech Systems, Inc.
MT202TD User Guide Index L Analog Loopback 18 LED Indicators 10 Limited Warranty 7 Line Requirements 6 Local Analog Loopback Test 18 B M Back Panel Connectors 14, 15 Mode of Operation 6 Model Numbers 6 Modem Connection 14 Modem Testing 18 Modulation 6 Multi-Tech Internet Sites 22 A C Carrier Detect (CD) 10 Carrier Frequencies 6, 7 CCITT V.
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