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Model 3550 2-Port TDM/Flex Upgrade
Feature Number 3550-F1-202
Installation Instructions
Document Number 3550-A2-GZ50-10
December 1996
Overview
The 2-port time division multiplexer (TDM/Flex) upgrade for the Model 3550 (standalone) DSU includes a
circuit card that rests in an expanded base with an expanded rear panel. With this upgrade installed, each port
(Port 1 or Port 2) can be configured independently to operate as an EIA-232 or V.35 interface via the diagnostic
control panel (DCP) or 6700 Series network management system (NMS).
The 2-port TDM/Flex upgrade consists of the following items:
•
One circuit card with expanded rear panel resting in an expanded base, and the pre-folded flat cable
•
Two thread-cutting screws
•
One screw with a captive-lock washer
If any item is missing, contact your service representative.
If connecting a port to data communications equipment (DCE), a crossover cable is required (feature number
3211-178F for a V.35 Crossover Cable or feature number 4951-035F for an
EI
A-232 Crossover Cable). If using
V.35 operation, a V.35 Interconnect Cable (feature number 3000-F1-510) is required for Port 2
;
the V.35
connector on the DSU is used for Port 1.
Before You Start
Refer to Chapters 4 and 5, Operating the DSU and Configuring the Unit, of the user’s guide if needed.
Procedure
1. Make a copy of the Configuration Worksheet with Full Mode enabled (Appendix B of the user’s guide).
2. Access Stat (Status branch), then ID (Identity subbranch).
3. Record the unit’s serial number at the top of Page 1 of the Configuration Worksheet.
4. Access Confg (Configuration branch).
5. Verify that Full Mode (Menu subbranch) is enabled.
6. Record the configuration option settings for each option set (DSU, Diag, etc.) on the Configuration
Worksheet.
7. Record all Backup Directory entries on the worksheet if a DBM is installed.
8. Record the unit’s local telephone number (Phone) if a DBM is installed.
TM
Содержание COMSPHERE 3550 Series
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