Connecting The Dsu To A Dte; Installing Cables - Paradyne COMSPHERE 3550 Series User Manual

COMSPHERE 3550 Series Data Service Units

Connecting the DSU to a DTE

The DSU's rear panel has both a 25-pin EIA-232-D/
V.24 connector and a 34-pin ITU-T 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 adapter to provide an
interface between the TDM/Flex's D-type connector and
the DTE cable's V.35 connector.
Figure 2-7 shows a DSU as well as a DSU equipped
with a TDM/Flex. The DSU without TDM/Flex illustrates
cabling for an EIA-232 application; the DSU with
TDM/Flex illustrates cabling for V.35 applications. Refer
to this figure as you connect your DSU to the data
terminal equipment (DTE). Be sure to select the
appropriate cable, EIA-232 or V.35, for your application.
DSU with
TDM/FLEX
2-10
"
1. Connect the plug end of the DTE cable to Port 1,
2. Connect the other end of the cable to the
3. If necessary, activate the port to match the
DSU
Interface
EIA-232-D/V.24
Interface (Port 1)
V.35 Interface
(Port 1)
To DTE
Figure 2-7. Installing Cables
July 1999
Procedure
either the EIA-232-D or the V.35 connector.
(Figure 2-7 shows Port 1 using the EIA-232-D
connector.)
Tighten the two holding screws.
appropriate port on the computer or DTE.
Tighten any holding screws.
interface, either EIA-232 or V.35 (the default
setting is EIA-232).
EIA-232-D/V.24
Interface
V.35
To DTE
Low Voltage
AC Power In
EIA-232
Interface
(Port 2)
V.35 Adapter
V.35 Cable
99-16299
3550-A2-GB20-40