Multi-Tech Systems MT56DSU-S - Manuals

7 Chapter 1 - Introduction 1.3 Description The MT56DSU-S is compact, easy to operate and has the features to allow flexibility in meeting yourtransmission requirements. The DDS is a service for transmission of digital signals via digital transmissionfacilities exclusively. The MT56DSU-S is designed ...

8 Chapter 1 - Introduction 1.5 Features The MT56DSU-S provides many useful features. Standard features include V.35 and EIA-232-D interfaces onthe data port (DTE device) and a synchronous rate of 56 Kbps on both the data port and trunk, and user-selectable clocking option. Your Multi-Tech DSU/CSU pr...

9 Chapter 1 - Introduction 1.6 Specifications Model Number: MT56DSU-S Device Operation: combined DSU and CSU Data Rates:Synchronous 56 Kbps (Data port and line) Interfaces: Data (RS232) DB25S (female) - Data port Data (V.35) DB25S (female) - Data port with an adapter cable Line (DDS) RJ-48 8-positio...

11 Chapter 2 - Front & Back Panel Descriptions 2.1 Introduction This chapter describes the front panel LEDs and back panel connectors. The front panel has one row ofLEDs. Two back panel connectors provide the data and DDS or LADS connections. A circular powerconnector is provided to connect the ...

12 Chapter 2 - Front & Back Panel Descriptions 2.3 Back Panel All the cable connections, including one power connection and two signal connections, are made at the backpanel of the DSU. The RS232 connector is used to connect the DSU to an RS232 or V.35 device, and theLINE connector connects to a...

13 Chapter 2 - Front & Back Panel Descriptions 2.4 Switch Settings An 8-position DIP switch is located on the right side of the MT56DSU-S printed circuit board (when viewedfrom the front, as in Figure 2-3). The DIP switch functions are described in the following table. 1 2 3 4 5 6 7 8 DIP-Switch...

14 Chapter 2 - Front & Back Panel Descriptions 2.5 Shunts V.35 signal levels are more reliable for high speed data and/or longer cable distances. For higher speedsand/or longer distances, V.35 is preferred. EIA-232-D signal levels are intended for data rates of 19.2 Kbps orless and cable lengths...

17 Chapter 3 - Unpacking & Setup 3.4 Setup Perform the following procedure to connect your cables and, if necessary, change to V.35 signaling on thedata port. 1. If the DTE device has a V.35 interface, the internal shunt must be moved to the V.35 position and a V.35adapter cable must be connecte...

26 Chapter 5 - Service & Warranty 5.2 Repairs 5.2.1 Repair Procedures for U.S. and Canadian Customers In the event that service is required, products may be shipped, freight prepaid, to our Mounds View,Minnesota factory: Multi-Tech Systems, Inc.2205 Woodale DriveMounds View, MN 55112Attn: Repair...

27 Chapter 5 - Service & Warranty Repairs for damages caused by lightning storms, water, power surges, incorrect installation, physical abuse,or user-caused damages are billed on a time-plus-materials basis. 5.2.3 Repair Procedures for International Distributors Procedures for International Dist...

29 Appendix Appendix A - Application Examples Introduction This section illustrates several types of applications in which the MT56DSU-S is typically used. These typesinclude: • Local Area Data Set • DDS point-to-point application • DDS multipoint (polled) application Local Area Data Set Application...

31 Appendix Appendix B - Interface Signals and Connector Pinouts RJ-48 Connector Pin 1 Pin 8 Key As viewed from the rear Figure B-1. Connector DESCRIPTION This connector ties the MT56DSU-S to the DDS Network. The RJ-48 connector is keyed for proper insertionof a keyed RJ-48 plug. PIN IDENTIFICATION ...

32 Appendix DB25S Connector 13 12 11 10 9 8 7 6 5 4 3 2 1 25 24 23 22 21 20 19 18 17 16 15 14 Figure B-2. Connector DESCRIPTION This connector ties the MT56DSU-S to the DTE. The DB25S connector has the following pinoutconfiguration. PIN IDENTIFICATION Pin Description Signal 1 Chassis Ground 2 Transm...

33 Appendix DB25S Connector with V.35 Interface 13 12 11 10 9 8 7 6 5 4 3 2 1 25 24 23 22 21 20 19 18 17 16 15 14 Figure B-3. Connector DESCRIPTION The DB25 connector also ties the MT56DSU-S to a DTE with a V.35 interface. When a V.35 interface deviceis connected to a MT56DSU-S, the internal shunt h...

36 Appendix Appendix C - Regulatory Information FCC Regulations for Telephone Line Interconnection 1. This equipment complies with Part 68 of the FCC rules. On the outside surface of this equipment is alabel that contains, among other information, the FCC registration number and ringer equivalencenu...

37 Appendix Canadian Limitations Notice Notice: The ringer equivalence number (REN) assigned to each terminal device provides an indication of themaximum number of terminals allowed to be connected to a telephone interface. The termination of ainterface may consist of any combination of devices subj...