Paradyne 3510 - Manual (Page 14)

COMSPHERE 3500 Series Data Service Units
1-2 March 1999 3510-A2-GN32-60
Both the Model 3510 and Model 3511 DSUs are
compatible with earlier DATAPHONE II 2500 Series and
2600 Series DSUs, and they incorporate a number of
enhancements. Model 3510 supersedes the 2556B, 2596B,
2656B, and 2696B DSUs. Model 3511 supersedes the
2556A and 2596A DSUs.
You can obtain compact standalone Model 3510 DSUs
for desktop installation or circuit card Model 3511 DSUs
for carrier-mounted installation (up to 16 units) in a
COMSPHERE 3000 Series Carrier.
The Model 3511 DSU (Figure 1-2) contains ‘‘gold
finger” contacts on the rear edge of its circuit card and is
used with a rear connector plate. The rear connector plate
contains two 25-pin (DB25) DTE connectors, a 25-pin
EIA-232-D/V.24 connector and a 25-pin ITU-T V.35
connector, which is shipped with a V.35 adapter. If you
intend to use a V.35 interface, use the adapter to convert
the DB25 V.35 interface (the bottom connector) to a
standard V.35 34-pin interface.
NOTE
All of the technical information in
this manual applies to both DSU
models, unless otherwise noted.
Gold Contacts
Modular DSU 25-Pin
EIA-232-D
Connector
25-Pin
V.35
Connector
Backplane
Connector
Figure 1-2. Model 3511 DSU and Rear Connector Plate