Serial Port
39
Model 3086 G.SHDSL Integrated Access Device User Guide
4 • Basic Application Configurations
Serial Port
Model 3986 units with serial port enable V.35 or X.21 interface connection to local DCE and DTE devices.
The V.35 interface is presented either on a M/34, or DB-25 female connectors. The X.21 interface is presented
on a female DB-15 connector. Figure 5 shows the different connectors offered for the serial port.
Figure 5. Rear panel power and interface connectors
Connecting the serial port
The serial port in the 3086 is simple to install. The V.35 interface is wired as a DCE, the X.21 interface can be
configured as a DCE (factory default), or as a DTE via internal configuration jumper.
Connecting the 3086 serial port to a DTE
The serial port on the Model 3086 is configured as a DCE so it connects directly to a DTE using a standard
straight through cable. The cable should present either a male M/34 or DB-25 connector on one end, for V.35
interfaces, or a male DB-15 for X.21 interface connection. The other end should be terminated with the
appropriate connector ( check your DTE equipment manual for pinout, gender, and DTE/DCE port configu-
ration).
