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.
\
3088/D (V.35, female DB-15)
3088/CA (V.35, female DB-25)
Figure 5. Model 3088 V.35/X.21 interfaces.
5.2CONNECTING 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.
DSL Span
Remote Model 3088
Straight-Through Cable
Model 3088/CA (DCE) | V.35 Router (DTE) |
Figure 6. Connecting the Model 3088/CA to V.35 Serial DTE