Paradyne 3551 User Manual

3550-A2-GB20-20

December 1996

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The Model 3550 DSU is designed for desktop

operation and is delivered ready to connect to the
network. It is configured as a tributary DSU for operation
at 9.6 kbps on a multipoint circuit.

If the unit was ordered with a TDM/Flex installed,

Ports 1 and 2 are configured for 9.6 kbps operation, and
configured as a digital sharing device (DSD). Both ports
are configured for EIA-232 operation, rather than V.35
operation. Refer to the MUX (Port) option set tables in
Chapter 5 to change this configuration on a port-by-port
basis.

Installation consists of the following steps, which

should be performed in the order listed.

•

Physical installation

•

Hardware straps

•

Electrical connection

•

Network diagnostic connection

•

Software configuration

•

DDS network (or LADS) connection

•

Dial (or PSTN) network connection if a DBM is
installed, or if using an external dial backup unit
(DBU)

•

DSU DTE connection

•

Verification testing

Although the Model 3550 DSU is designed for desk or

table-top operation, you can order an ACCULINK

r 

3100 Series CSU wall-mount adapter if you want to
mount the DSU on a wall, an equipment shelf, a 19-inch
RS-310-C or 23-inch AT&T DATAPHONE

r equipment

cabinet. Refer to Appendix F to order the adapter.

Your installation site should be clean, well-lighted,

well-ventilated, and free from environmental extremes.

A dedicated grounded ac outlet that is protected by a

circuit breaker should be installed within 6 feet of the
DSU’s planned location. The outlet should be capable of
supplying 90 to 132 Vac 60 Hz (U.S. and Canada). The