Multitech MT56DSU-S User Manual Download Page 19 | Manualshive

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Multitech MT56DSU-S User Manual Download Page 19

Chapter 4 - Diagnostics

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Summary of Contents for MT56DSU-S

Page 1: ...MT56DSU S Syncronous 56K bps Data Service Unit User Guide...

Page 2: ...n of Multi Tech Systems Inc to notify any person or organization of such revisions or changes Revision Date Description A 12 30 2003 Initial release of MT56DSU S User Manual on CD Trademarks MultiTech...

Page 3: ...Introduction 11 2 2 Front Panel 11 2 3 Back Panel 12 2 3 1 POWERConnector 12 2 3 2 RS232Connector 12 2 3 3 LINEConnector 12 2 4 Switch Settings 13 2 5 Shunts 14 Chapter 3 Unpacking Setup 15 3 1 Introd...

Page 4: ...ernationalDistributors 27 5 2 4 ReplacementParts 27 5 3 Technical Support 27 5 4 Internet Site 27 Appendix 28 Appendix A Application Examples 29 Introduction 29 Local Area Data Set Application 29 DDSP...

Page 5: ...Chapter 1 Introduction...

Page 6: ...ption Chapter 3 Unpacking and Setup provides unpacking safety warnings setup procedures and how to change the shunt from the default RS232 position to the V 35 position Chapter 4 Diagnostic Testing ex...

Page 7: ...d a CSU Channel Service Unit are typically connected to provide the interface between DTE data terminal equipment and a DDS or other four wire network The DSU processes serial synchronous digital data...

Page 8: ...Multi Tech DSU CSU provides the following features Supports direct connection to the DATAPHONE Digital Data Service DDS or compatible network Standard EIA 232 D and V 35 interfaces on the data port D...

Page 9: ...Hz 2 Watts Temperature 32 to 120 F 0 to 50 C Humidity 20 to 90 non condensing Dimensions 1 H x 4 125 W x 5 5 D 2 5 cm H x 10 8 cm W x 14 2 cm D Weight 8 oz 224 g Certification FCC Part 15 Class B FCC...

Page 10: ...Chapter 2 Front Back Panel Descriptions...

Page 11: ...ing frames and line status Figure 2 1 Front Panel TD Transmit Data TD LED blinks when data is being transmitted on for a space and off for a mark RD Receive Data RD LED blinks when data is being recei...

Page 12: ...nsformer plugs directly into an AC outlet 2 3 2 RS232 Connector The RS232 Data connector is used to connect the DSU to a sync device such as multiplexers routers or legacy equipment such as cluster co...

Page 13: ...d when viewed from 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 Figure 2 3 Switch Settings Table 2 1 Switch Settings Switch Mode...

Page 14: ...ess There are two shunt positions in the middle left side of the printed circuit board that configure the data port for either RS232 or V 35 operation The shunt positions are shown in Figure 2 3 V 35...

Page 15: ...Chapter 3 Unpacking Setup...

Page 16: ...ts final location and verify the signal levels EIA 232 D or ITU T V 35 for the data port and connect your cables phone lines and power supply 3 3 Telecom Safety Warnings 1 Never install telephone wiri...

Page 17: ...e details If the DTE device has an EIA 232 D interface a standard RS232 straight thru cable can be used POWER LINE RS232 To Power Outlet To DTE Device To Line Jack Figure 3 1 Back Panel Connections 2...

Page 18: ...oid any chance of electric shock 1 Unplug the power cord 2 The enclosure consists of two halves Using a Phillips screwdriver remove the two screws from the bottom of the unit Remove the top half 3 Car...

Page 19: ...Chapter 4 Diagnostics...

Page 20: ...eck the remote far end transmitting equipment If the remote equipment is transmitting properly contact your telephone company If the Telco is required to perform remote tests the channel will be tempo...

Page 21: ...ester Remote DSU In Line Loopback Test Mode Figure 4 2 Line Loopback Test Diagram 4 1 3 DSU Loopback Test This test lets you verify proper DSU operation by matching a transmitted signal to the looped...

Page 22: ...emble one Refer to Appendix B for instructions on building the Back to Back cable 2 Plug the cable into each DSU s Line jack 3 On the good DSU set DIP switch 3 to the down position 4 Set one DSU to in...

Page 23: ...Chapter 5 Service Warranty...

Page 24: ...IRCUMSTANCES WILL ITS LIABILITY EXCEED THE PRICE FOR DEFECTIVE PRODUCTS 5 1 2 U S and Canadian Customers In the event that service is required products may be shipped freight prepaid to our Mounds Vie...

Page 25: ...description of the problem a return shipping address must have street address not P O Box your telephone number and if the product is out of warranty a check drawn on a U S bank or your company s purc...

Page 26: ...plus materials basis 5 2 2 Repair Procedures for International Customers Your original point of purchase Reseller may offer the quickest and most economical repair option for your Multi Tech product Y...

Page 27: ...t Multi Tech Systems has an excellent staff of technical support personnel available to help you get the most out of your Multi Tech product If you have any questions about the operation of this unit...

Page 28: ...Appendix...

Page 29: ...s of AWG 26 wire at 56 Kbps or longer for subrate applications The figure below depicts a typical Local Area Data Set application DTE Up to 3 miles of AWG 26 wire 56 Kbps DTE DSU DSU Requires two pair...

Page 30: ...ntrolled by the DTE Multipoint DDS provides communication between a control station and two or more remote stations All data transmitted by the control station is sent to each remote station For data...

Page 31: ...re B 1 Connector DESCRIPTION This connector ties the MT56DSU S to the DDS Network The RJ 48 connector is keyed for proper insertion of a keyed RJ 48 plug PIN IDENTIFICATION Pin Description Destination...

Page 32: ...e MT56DSU S to the DTE The DB25S connector has the following pinout configuration PIN IDENTIFICATION Pin Description Signal 1 Chassis Ground 2 Transmit Data SD 3 Received Data RD 4 Request To Send RTS...

Page 33: ...to a MT56DSU S the internal shunt has to be moved to the V 35 position The V 35 interface for the DB25 connector has the following pinout configuration PIN IDENTIFICATION Pin Description 1 Chassis Gr...

Page 34: ...rison to the original signal sent You can order this cable 45640100 from Multi Tech or build one using the instructions below Refer to Chapter 4 for test procedures SCHEMATIC RJ48S 1 2 3 4 5 6 7 8 6 R...

Page 35: ...sing the instructions below Refer to Chapter 4 for test procedures SCHEMATIC RJ48S 1 2 3 4 5 6 7 8 7 RJ48S 8 7 6 5 4 3 2 1 Figure B 8 BUILD INSTRUCTIONS 1 Strip cable installation 3 4 2 Strip wires 1...

Page 36: ...he 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 equipm...

Page 37: ...ted to the facilities of the local telecommunications company The equipment must also be installed using an acceptable method of connection The customer should be aware that compliance with the above...

Page 38: ...S000327A...

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