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3611-A2-GZ43-30
December 1999
2. Pull out and down on the latch at the bottom of the modular DSU’s faceplate until the circuit card starts to
come out of its slot in the carrier. Pull the circuit card free of the carrier and lay it on a clean, flat work
surface.
3. At the rear of the carrier, disconnect the DTE interface cable from the rear connector plate. (It is not
necessary to power down the carrier.)
4. Remove the rear connector plate.
ADDING THE TDM OR MCMP OPTION TO THE
MODULAR 3611 DSU
To install the 6-port connector module and add the TDM or MCMP option to a Modular 3611 DSU, perform the
following steps:
1. At the rear of the carrier, set the tabs on the 6-port connector module into the slotted grooves on the
carrier’s backplane. (Note that the connector module occupies two slot positions.) Make sure the
connector module uses the same slot positions intended for the modular DSU-TDM (or modular
DSU-MCMP) circuit cards.
2. Loosely fasten the screws attached to the connector module, allowing for slight adjustment that may be
needed when installing the modular DSU-TDM (or modular DSU-MCMP) circuit cards. The two screws
on the connector module must be alternately fastened.
3. Insert the two plastic snaplock posts into their respective holes in the modular DSU circuit card. See
Figure 2.
PHILLIPS-HEAD
SCREW
CIRCUIT PACK
LOCK
EPROM
PHILLIPS-HEAD
SCREW
PHILLIPS-HEAD
SCREW
99-13859-01
Open
Closed
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NOTCH
DOUBLE-ENDED
PIN HEADER
LATCH
3611 DSU
FACEPLATE
CIRCUIT
PACK
LOCK
SNAPLOCK
POST
SNAPLOCK
POST
BLACK
BAND
STANDOFF
POSTS
TDM
FACEPLATE
FLAT
WASHERS
FLAT
WASHERS
LATCH
Figure 2. Modular TDM or MCMP Installation
