Where to Place the DSU, Installing the DSU | Paradyne 3551 manual

COMSPHERE 3550 Series Data Service Units

Where to Place the DSU

As mentioned earlier, the DSU must be placed within 6 feet of a dedicated grounded ac outlet that is protected by a circuit breaker.

The distance between the DSU and its DTE must be within EIA-232-D/V.24 limits, or V.35 limits if operating the DSU at speeds greater than 19.2 kbps.

•For the EIA-232 connector, the typical maximum distance is 50 feet at speeds less than or equal to 19.2 kbps. If a longer distance is needed, use high quality, low capacitance cable and ensure that the effective shunt capacitance of the circuit (measured at the DSU and including the capacitance of the cable and the DTE) does not exceed 2500 picofarads, as specified in EIA-232-D.

•For the V.35 connector, the maximum distance recommended between the DSU and the DTE is nominally 1000 feet.

Allow 1 to 2 feet of clearance around the DSU for access and cable connections during installation.

Installing the DSU

Before installing the DSU, label the circuit breaker that protects the ac wall outlet, and make sure that it is set to ON. Then, proceed with the installation.

.Procedure

1.Place the DSU in its planned location. Make sure the ventilation slots are not blocked.

2.At the rear of the DSU (Figure 2-2), insert the ac transformer, circular plug into the interface labeled

POWER.

3.Plug the ac transformer's 3-prong plug into the ac wall outlet.

CAUTION

Only use the power transformer designed for the Model 3550 DSU. Using other transformers may result in personal injury or damage to the equipment.

Figure 2-2. Model 3550 Electrical Connection

2-4

December 1996

3550-A2-GB20-20

Image 25

Paradyne 3551 manual Where to Place the DSU, Installing the DSU

Contents

Comsphere 3550 Series Data Service Units Models 3550 Trademarks Warranty, Sales, and Service InformationCopyright 1996 Paradyne Corporation. All rights reserved Important Safety Instructions CC DGD D C D CC Interface Data Rate Code Bps Government Requirements Comsphere 3550 Series Data Service Units Table of Contents Glossary Index List of Figures List of Tables Hubbing Device CC IN/DC OUT Jack Pin Assignments Preface How to Use This GuideAbout This Guide Reference Documents Related Documents About Your DSU Standard FeaturesOverview 32 DBM Optional Features Technical Specifications Upgrades AvailablePort TDM/Flex CSA Specifications Criteria DSU Heat Dissipation MAX. AT 115 VAC Lads DSU Technical Specifications DOC DBM Technical Specifications Criteria Port TDM/Flex Technical Specifications Equipment Warranty Support Before You Begin Installing the Model 3550 DSU Procedure How to Change Hardware Straps Permissive V.32 DBM transmit output level of ±9 dBm Installing the DSU Where to Place the DSU Power-Up Routine Connecting to the Network Connecting to the Dial or Pstn Network Connecting to the NMS Model 3550 DSU DDS Lads Network Connection Connecting to the DDS or Lads Network Addressing the Unit Lads Connection Distances Data Rate Wire Gauge AWG Kbps Addressing Example Tributary DSU Addressing Installing Cables Connecting the DSU to a DTE Connecting Port Verifying Operation and Testing ConnectionsVerifying Network Addresses Verifying the Network Verifying TDM/Flex Operation Verifying DBM OperationOther Tests Installing the Model 3551 DSU Before You Begin Off Strap State Function Designation Jumper Strap Model 3551 DSU Jumper Straps Comsphere 3000 Series Carrier, Rear View Model 3551 DSU Installation and Circuit Pack Lock V.35 Interconnect Cable Installation Connecting to Dial or Pstn Network Connecting to DDS or Lads Network Verifying Operation and Testing Connections Verifying Network Addresses, the Network, and DBM Operation To Connect the Sdcp to a DSU Other Tests Operating the DSU DCP and Sdcp Operation Model 3550 Diagnostic Control Panel Sdcp and Model 3551 DSU Faceplate Keypad Menu Structure Status BranchHealth and Status Top-Level Menu DTE Status Terminal PowerCircuit Quality Identity Dial Backup Operation Backup BranchConfiguring the Unit for Dial Backup Identity Descriptions Auto Bckup ± Select Enab Understanding Operating Modes Placing a Backup Call Manual BackupManual Dial Backup Termination Manual DDS Restoration Abort Test BranchDevice Test Loopback DTE Loopback Bilateral LoopbackDigital Loopback Remote Digital Loopback End-to-End Test Bit Error Rate Test Selecting Menu Mode Configuration BranchBit Error Rate Test Results Information Displayed Lamp Test Selecting an Application Configuration Reconfiguring a DSU Port Configuration OptionsReconfiguring a TDM/Flex Port Displaying the Poll List Poll ListChanging the Poll List Q u i r P o l l L i s t Abort Acquiring the Poll List Entering a Telephone Number Directory Phone Directory Entry and Password Characters UseNetwork Address Assigning an Address Transmitter Control Control BranchLEDs External Leads Messages Branch Lead States SymbolReporting External Lead Changes to NMS Security Functions Available Access Level Security Access LevelsFront Panel DCP Security Configuring the Unit Editing Configuration Values Using the DCP to Set Configuration Options Example Using the DCP Saving Configuration Options Ptpc Understanding the Tables Configuration Option Tables DDS DSU Configuration Options Support a Transmit Elastic Store Diagnostic DSU Configuration Options Diagnostic DBM Configuration Options Diagnostic General Configuration Options Diagnostic External DBU Configuration Options DTE operation RXC DBM Configuration Options Disab Select disable if you do not have an extended network DSUs and DBMs If DTR is low DCE External DBU Configuration Options DTE General Configuration Options=RTS Select to ignore the Loopback command Signal is dropped DTE asynchronous data rate Backup Configuration Options TriesTimeOut period expires MUX Port Configuration Options MUX Setup Configuration OptionsDSD 1800 Select the rate of the asynchronous port Configuration option Receiver Carrier Select Messages to the DSU Port Speed DSU Configuration Options Port Speed DBM Configuration Options Port Speed External DBU Configuration Options Port1 DSU 9.6 C Local Remot Msg DSU Menu a Comsphere 3550 Series Data Service Units DSU Menu Local branch Local/Remote Menu Subbranches Overview Instructions Configuration Worksheets B Model 3550 or 3551 DSU Configuration Worksheet 1 Model 3550 or 3551 DSU Configuration Worksheet 2 Full Menu Mode Disabled Port Speed DSU Value Status Indicators Status Indicators and C Control Panel Messages Sdcp Status Indicators DSU Status IndicatorsTable C-1 Label Color Description Format Control Panel MessagesHealth and Status Messages Table C-3 Device Health and Status Messages Condition Table C-3 Device Health and Status Messages Condition Pnnn Tst test,init Message Condition Failnreason Table C-4 Expanded Health and Status Messages Condition DTR Table C-5 Subnetwork Health and Status Messages ConditionMUX Table C-7 Dial Backup Progress Messages Condition Command Progress MessagesProgress Messages Table C-8 Command Error Messages Condition Action Error Messages DBM Table C-10 TDM/Flex Error Messages Condition Action Prt2 Table C-10 TDM/Flex Error Messages Condition Action Pin Assignments D Figure D-1. Digital Network Connector Pin Circuit Function Table D-1Hubbing Device DCORD/CCISD DCOSD/CCIRDDCOCTS/CCIRTS DCORTS/CCICTS OUT DCOSD/CCIRD GND Comsphere 3550 Series Data Service Units SBB SBA Figure D-4. V.35 Interconnect Cable 3000-F1-510 Cable Circuit Name Pin Number Figure D-5. EIA-232-D Crossover Cable 4951-035F Figure D-6. V.35 Crossover Cable 3211-178F Point-to-Point Applications Application Configurations E Comsphere 3550 Series Data Service Units Multipoint Applications Figure E-2. Multipoint Application Configurations Equipment List = Factory InstallEquipment Comcode Comsphere 3000 Series Carrier, Installation Manual Equipment Part Number Pin-to-Pin EIA-232 Cable straight connection 10 i Ð Active core Glossary CSA DOC LDM RTS TXD Index Index-2 Configuring unit DSD Index-5 MUX Index-7 SDCP, C-2 Index-9