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The RJ-45 connector on the Model 3088’s twisted pair interface is polar-
ity insensitive and is wired for a two-wire interface. The signal/pin rela-
tionships are shown in figure 5.
\
Figure 5. Model 3088 V.35/X.21 interfaces.
5.2 CONNECTING THE MODEL 3088/CA (V.35)
SERIAL INTERFACE
Model 3088/CA supports V.35 serial port connections. This section
describes how to connect the serial ports to your V.35 equipment.
Connecting the Model 3088/CA (V.35) to a “DTE” Device
The Model 3088/CA provides a V.35 DCE (data circuit terminating equip-
ment) interface on an DB-25 female connector. As a DCE, this interface
is designed to connect to DTE equipment, such as a router. When con-
necting the V.35 interface of the Model 3088/CA to your DTE device, use
a V.35 straight-through cable (See figure 6). Appendix C describes pin
assignments and signal sources for the Model 3088/CA V.35 interface.
When purchasing or constructing an interface cable, refer to the pin dia-
grams in Appendix C as a guide.
Figure 6. Connecting the Model 3088/CA to V.35 Serial DTE
3088/D (V.35, female DB-15)
3088/CA (V.35, female DB-25)
Straight-Through Cable
DSL Span
Model 3088/CA (DCE)
Remote Model 3088
V.35 Router (DTE)