User Manual

AirLink Pro T1/E1 Rack Mount Installer’s Guide
Configuration
Rev. B - 1/97
3-30
CONNECT telephone-number
When the parameter is given as 1 or 2, the unit will dial the stored primary or
backup phone number respectively. Otherwise, the modem will dial the
number supplied on the command line. The telephone number must follow the
syntax of the configured telephone numbers.
CONNECT does not automatically retry upon dial-out failure; this is strictly a
manual operation. To redial, use the control-R key to repeat the last command.
When this command is used, the connection remains in effect until the user
issues a DISCONNECT command, the remote modem hangs up, or (if
configured), a Connection Timeout timer expires.
Manual or automatic connections can be terminated immediately by using the
following command:
DISCONNECT
This immediately hangs up the telephone connection and returns the dial-out
function to IDLE. RTS is returned to its configured state and DTR is released.
DISCONNECT also abandons any dial-out attempt in progress but does NOT
prevent future dial-outs. For this reason, the mode should be set to DISABLED
before performing any maintenance functions.
RS-232 Modem Port Interface
Data Rate and Port Parameters
The Data Rate is part of the port configuration. The available rates are 1200,
2400, 4800, and 9600 bits per second.
So-called "smart modems" of the type commonly in use, "auto-baud" or adjust
their RS-232 bit rate to that of the DTE.
Before using an unknown modem, it is a good idea to reset its configuration to the
factory defaults, then configure the three-wire operation if desired. For most
modems, this can be accomplished by issuing the following commands:
AT&F<RETURN> Reset to factory defaults
AT&K0<RETURN> Ignore RTS
AT&D0<RETURN> Ignore DTR
The remaining unchanging port parameters are:
1 start bit
1 stop bit