Paradyne 3551 - Manual (Page 10)

8
Connecting the Model 3550 DSU to a DTE
The DSU’s rear panel has both a 25-pin EIA-232-D/V.24 connector and a 34-pin CCITT
V.35 connector (used for higher operating speeds). You can use either interface.
When the unit is equipped with a TDM/Flex, either of these interfaces can be used as
Port 1. The TDM/Flex provides an additional interface to be used as Port 2. This is a
D-type connector. If the port is to operate at a speed greater than 19.2 kbps, use the
V.35 interconnect cable to provide an interface between the TDM/Flex’s D-type
connector and the DTE cable’s V.35 connector.
Be sure to select the appropriate cable (EIA-232 or V.35) for your application.
"
Procedure
1. Connect the plug end of the DTE cable to Port 1, either the EIA-232-D or the V.35
connector. Tighten the two holding screws.
2. Connect the other end of the cable to the appropriate port on the computer or DTE.
Tighten any holding screws.
3. If necessary, activate the port to match the interface: EIA-232 or V.35. The default
setting is EIA-232.
V.35 Interface
(Port 1)
EIA-232-D/V.24
Interface (Port 1)
EIA-232
Interface
(Port 2)
DSU with
TDM/FLEX
99-16244
To DTE
EIA-232-D/V.24
Interface
V.35
Interface
Low Voltage
AC Power In
To DTE
DSU