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COMSPHERE 3500 Series Data Service Units
1-2 January 1998 3510-A2-GN32-50
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 CCITT V.35
connector, which is shipped with a V.35 interconnect
cable. If you intend to use a V.35 interface, use the cable
provided 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.
Figure 1-2. Model 3511 DSU and Rear Connector Plate