COMSPHERE3550 SERIESDATA SERVICE UNITSMODELS 3550 AND 3551QUICK REFERENCEDocument No. 3550-A2-GL10-10
8Connecting the Model 3550 DSU to a DTEThe DSU’s rear panel has both a 25-pin EIA-232-D/V.24 connector and a 34-pin ITU-TV.35 connector (used for hig
9Connecting the Model 3550 DSU’s Port 2For the EIA-232 cable, install as described above.For the V.35 cable, install the V.35 adapter, then the V.35
10Table 2. Model 3551 DSU Switch SettingsSwitchPositionSwitch SettingFunctionS1 1ON(default)Permissive V.32 DBM transmit output level of –9 dBmS1-1Of
11Table 3. Model 3551 DSU Jumper StrapsStrapDesignationState ofJumperStrapFunctionJ12 Left V.35 Test Mode Indication:Left — Enables V.35 Test Mode In
12Installing the Model 3551 DSUThe initial installation procedure for the Model 3551 DSU requires the installation of arear connector plate onto the
135. At the front of the carrier, hold the DSU vertically with the latch on its faceplate inthe open position. Then, insert the circuit card into the
147. At the rear of the carrier, connect the appropriate DTE interface cable (EIA-232-Dor V.35) to the rear connector plate. For an EIA-232-D interfa
15Connecting the Model 3551 DSU to the NMSA Model 3551 DSU is set up for network diagnostic connection through the shareddiagnostic unit (SDU), which
16To Connect the SDCP to a DSUFor the carrier-mounted Model 3551 DSU, the SDCP must first be reconnected to theDSU. Once connected, the SDCP operates
17Addressing the UnitA unique address must be assigned to each control and tributary DSU in your network.You can assign an address within the range o
Copyright 1999 Paradyne Corporation.All rights reserved.Printed in U.S.A.NoticeThis publication is protected by federal copyright law. No part of th
18Power-Up RoutineWhen power is applied, the DSU:H Determines what options (DBM or TDM/Flex) are installed, if any.H Runs a Device Test on itself and
19Configuration OptionsConfiguration options are accessed from the Configuration branch of the front panelmenu.In the following tables, factory defau
20Diagnostic GeneralConfiguration OptionsValuePosition Cntrl (PTPC, MPTC), Trib (PTPT, MPTT)LinkConfg Pt-Pt (PTPC, PTPT), M-Pt (MPTC, MPTT)Resp Perio
21GeneralConfiguration OptionsValueDTE Port EIA232, V.35RTS Cntrl FrcOn (PTPC, PTPT, MPTC), DTE (MPTT)CTS Cntrl Std, =RTS, Delay, FrcOnAntiStream D
22MUX PortConfiguration OptionsValueDTE Port EIA232, V.35Async→Sync Enab, DisabAsync Rate =Sync, 1800, 1200, 600, 300, 150AsyncBit/Char 6, 7, 8, 9, 1
23!Important Safety Instructions1. Read and follow all warning notices and instructions marked on the product orincluded in the manual.2. This produc
24Notices!WARNING:
25If your DSU causes harm to the telephone network, the telephone company maydiscontinue your service temporarily. If possible, they will notify you
496-15149TM 1COMSPHERE 3550 SERIES DATA SERVICE UNITSMODELS 3550 AND 3551Quick ReferenceDocument Number 3550-A2-GL10-10March 1999Product Documentation
2Changing the Model 3550 DSU Hardware StrapsThe Model 3550 DSU has a switch located behind its diagnostic control panel (DCP).This switch contains tw
3Table 1. Model 3550 DSU Switch SettingsSwitch Position Switch Setting FunctionS1 1ON(default)Permissive V.32 DBM transmit output levelof –9 dBmS1-1O
4Installing the Model 3550 DSUBefore installing the DSU, label the circuit breaker that protects the ac wall outlet, andmake sure that it is set to O
5Connecting the Model 3550 DSU to the NMSA 3600 Hubbing Device is required to connect the control DSU to the 6700 Series NMS.When connected to the NM
6Connecting the Model 3550 DSU to the Dial Network (PSTN)If your DSU is equipped with a V.32 DBM, follow these steps. Procedure1. Plug either end of
7Connecting the Model 3550 DSU to the DDS (or LADS) NetworkNOTE:Before connecting the DSU to the DDS network, ensure that approved primaryprotectors
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