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Model 3610 Installation
2-133610-A2-GB41-60 March 1999
Adding a TDM/Flex or
MCMP/Flex to an Installed
Model 3610 DSU
This section describes the procedure for adding a
TDM/Flex or MCMP/Flex upgrade for the Model 3610
DSU.
The time division multiplexer (TDM/Flex) or
multichannel multipoint (MCMP/Flex) upgrade for the
Model 3610 (standalone) DSU includes a circuit card that
rests in an expanded base with an expanded rear panel.
If this upgrade is to be installed on a DSU with
firmware version 6.3x or greater, each port (Port 1 or
Port 2 for the 2-port version, or Ports 1 through 6 for the
6-port version) can be configured independently to
operate as an EIA-232 or V.35 interface via the DCP, an
async terminal, or a 6700 or 6800 Series NMS.
If the upgrade is to be installed on a DSU with
firmware version less than 6.3x, Switch S1 must be
changed to switch all ports from EIA-232 to V.35
operation. Only the 6-port TDM/Flex or MCMP/Flex can
be used with DSUs with firmware version (DSU SW ver:)
less than 6.3x; the 2-port TDM/Flex or MCMP/Flex is not
supported.
If installing a 6-port TDM/Flex or MCMP/Flex and
your DSU has a wall-mount ac transformer, a table-top
transformer must be ordered (part number
654-0099-0131).
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 EIA-232 Crossover Cable). If using
V.35 operation, a V.35 adapter (feature number
3000-F1-510) is required for Ports 2 through 6; the V.35
connector on the DSU is used for Port 1.
Before disconnecting the DSU:
" Procedure
1. Copy the applicable Configuration Worksheet
from Appendix B.
2. Access Stat (Status branch) and 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. Record the configuration option settings for each
option set (DSU, Diag, etc.).
If a DBM is installed, continue with:
1. Record all Backup Directory entries.
2. Record the unit’s local telephone number (Phone).
For instructions and handling precautions for opening
the DSU, refer to the Hardware Straps and Changing the
Hardware Settings sections of this chapter.