User manual

AT COMMANDS: DATA MODEM 2-15

\F – Displaying the Telephone Number Store

The command AT\F displays the telephone numbers stored with AT&Z.

\G – Modem/Modem Flow Check

The \G command determines whether the modem/modem Flow Check is switched

on during a “Normal” connection. This Flow Check supports the modem, if data

are sent more quickly than they can be handled.

If the MNP buffer is full, it will send an XOFF signal (13A decimal) to the com-

puter, so that it will interrupt the data transmission. As soon as the buffer store is

ready to accept data again, the modem sends an XON signal (11 decimal), where-

upon the computer takes up the data transmission again.

AT\G0 XON/XOFF Flow Check OFF (factory setting)

AT\G1 XON/XOFF Flow Check ON

\J – Baud rate Adjustment via the Computer

The \J command determines whether the speed of transmission from modem to

computer will be adjusted to the speed of transmission along the telephone line.

AT\J0 Baud Rate Adjustment OFF. The modem/computer transmission

speed remains unchanged at the interface, without taking account

of the speed between modem and modem. If the interface speed is

set to more than 14 400 bps, or where MNP connections are au-

thorised, you must apply a method of Flow Checking (either RTS/

CTS or XON/XOFF - see \Q command) in order to ensure that the

buffer does not “overﬂow” and cause data to be lost.

AT\J1 Baud Rate Adjustment ON. The computer adjusts the speed at the

RS-232 interface to the speed of data transmission on the tele-

phone line. You can use this adjustment system, when the compu-

ter adjusts to the correct speed as a result of modem messages.

(Autobaud) (factory setting).