3Com 980/000048/001 Manual

A SERVICE OF

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DTE Port Pin Assignments

Each m

odem is equipped with a single serial port marked DTE, which

can be used to enter asynchronous AT or V.25bis commands, and pass

asynchronous or synchronous user data. This is a female 26-pin V.24

connector

and can be used with X.21/V.11, v.24/V.28 or V.35/V.36

signalling. The cable pin-outs for each type of cable are shown below.

X.21/V.11

The DTE port terminates with a 26-way miniature SCSI connector. The port

can be configured to support V.11 signalling characteristics. The DTE port

connecting cable is not supplied with the module. The following signalling

characteristics should be observed when purchasing or fabricating a

suitable cable.