3Com AccessBuilder 500 User Manual - page 97
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Interface Cable Characteristics
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WAN Port Connecting Cable – V.35/V.36 Support
The WAN port terminates with a 25-way D-type female connector. The
port can be configured to support V.36 signalling characteristics at data
transfer rates up to 48 Kbps. The WAN port connecting cable is not
supplied with the unit. The following signalling characteristics should
be observed when purchasing or fabricating a suitable cable.
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