Connecting the Model 3088/CA (V.35) to a “DCE” 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. However, tail-circuit applications require connection to another DCE equipment, such as a multiplexer. When connecting the V.35 interface of the Model 3088/CA to your DCE device (see figure 7), use a V.35 tail circuit cable. Some applications may also require the installation of a V.35 tail-circuit buffer to account for small differences in clock frequency between the 3088/CA and the V.35 DCE (Multiplexer).
DSL Span
Remote Model 3088
Straight-Through Cable
Model 3088/CA (DCE) | V.35 Router (DTE) |
Figure 7. Connecting the Model 3088/CA to V.35 Serial DCE
5.3 CONNECTING THE MODEL 3088/D (X.21) SERIAL INTERFACE
Model 3088/D supports X.21 serial port connections. This section describes how to connect the serial ports to your X.21 equipment.
Connecting the Model 3088/D (X.21) to a “DCE” or “DTE” Device
The Model 3088/D provides an X.21 interface on a DB-15 female con- nector. The X.21 interface default configuration is DCE for connection to DTE (data terminal equipment) such as a router. However, the X.21 inter- face on the Model 3088/D may be configured as DTE (data terminal equip-