Paradyne COMSPHERE 3550 Series User Manual page 41

7. At the rear of the carrier, connect the appropriate
DTE interface cable (EIA-232-D or V.35) to the
rear connector plate. For an EIA-232-D interface
cable, connect the EIA-232-D cable to the top
DTE connector on the rear connector plate.
For the 25-pin V.35 interface, a V.35 adapter plug
is shipped with the unit. To connect a V.35 adapter
plug to the 25-pin V.35 connector, refer to
Figure 3-4 and perform the following steps:
a. Connect the 25-pin end of the DSU's V.35
adapter plug to the bottom DTE connector of
the rear connector plate. Tighten the screws on
each side of the connector.
In applications where the screws of the V.35
adapter plug might be difficult to fasten
because of conflict with other connectors, use
instead a V.35 adapter cable (Feature Number
3000-F1-510).
b. Connect the 34-pin end of the DSU's V.35
cable to the V.35 adapter, then tighten the
screws on each side of this connector.
3550-A2-GB20-40
25-Pin Connector
Thumbscrews
V.35 Adapter
Figure 3-4. V.35 Adapter Plug Installation
July 1999
8. The installed DSU is connected to the DDS
network through the 50-pin connectors at the rear
of the carrier. These interfaces are specified in the
USOC RJ48T, and the pin assignments are shown
in Appendix D. Proper network connection to the
DDS facility or to the network channel-
terminating equipment must be made at the far
end of the cable.
9. If the network line and remote DSU are installed
and tested, do a Remote Loopback – a Test Pattern
test.
10. If the Front Panel test switch strap is to be
disabled, slide the DSU slightly out of the carrier,
open switch S3-1, then reseat the DSU into the
carrier. Do this now.
11. Circuit ID information can be written on the cover
plate under the appropriate slot number.
V.35 Cable
99-16298
Installing the Model 3551 DSU
3-7