Paradyne 3551 User Manual

Page 16

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 interconnect cable is shipped with the unit. To
connect a V.35 interface cable to the 25-pin V.35 connector, perform the following
steps:

— Connect the 25-pin end of the DSU’s V.35 Interconnect Cable to the bottom

DTE connector of the rear connector plate. Tighten the screws on each side of
the connector.

— Connect the 34-pin end of the DSU’s V.35 Interconnect Cable to the V.35

interface cable, then tighten the screws on each side of this connector.

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 of the User’s Guide. 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.

SLOTS 9 – 16

SLOTS 1 – 8

P26

P25

P24

P23

P20 P19

P22

P21

Rear Connector Plates

For Model 3551 DSUs

25-Pin V.35

Connector

Ferrite
Choke

V.35

Interconnect

Cable

34-Pin Connector

V.35 Interface Cable

99-16247