Cabletron Systems AirConnect 3Com - Manual (Page 20)

20 C HAPTER 1: O VERVIEW OF D IGITAL W IRELESS N ETWORKING
PPP Connection
Connecting an AP and a computer with a direct serial link requires the use of a
null-modem serial cable.
Connecting an AP and computer with modem devices requires the use of
straight-through cables between the APs and modems. Using modems requires
a telephone line for as long as the link remains active.
When using a modem connection, one AP represents the originating AP and the
other represents the answering AP. When using a PPP link, do not use the serial
port to access the UI. Access to the UI requires establishing a Telnet session with
the AP.