User manual

2-6 AT COMMANDS: DATA MODEM
Example of how to set up a Dial Command
ATD T0 , P 02212971
With this, a private automatic branch exchange
using tone-dialling dials zero, in order to obtain an exchange line. The modem
then waits one second for the “line-free” tone so that it can dial the rest of the tele-
phone number in pulse-dialling mode
Example of the Automatic Dialling Function
ATD T0 , P 02212971;H
If you lift the handset during the dialling process, you can take over the connec-
tion yourself.
➮ Where appropriate, ask the manufacturer of your private automatic branch ex-
change what specific features need to be taken into account in the dialling pro-
cedure
➮ If the handset is not replaced after the data transmission has been completed,
the connection remains made and you will continue to pay for this !
E – Echo Function
The E command determines whether the modem will issue an echo of the com-
mand which is entered.
ATE0 No command echoes are issued to the computer
ATE1 Command echoes are issued (factory setting)
F – Determining Type of Modulation and Speed
The parameter of this command determines the type of modulation. It operates in
conjunction with the N command and the S37 Register.
ATF0 Automatic recognition of the remote modem's capabilities. Con-
nections with all possible speeds are authorised. The S37 value
and interface speed are ignored.
ATF1 V.21 or Bell 103 (according to the B command)
ATF3 V.23 (send 75 bps, receive 1200 bps)
ATF4 V.22 1200 bps
ATF5 V.22bis 2400 bps; Fallback to 1200 bps possible
ATF6 V.32bis or V.32 4800 bps
ATF7 V.32bis 7200 bps
ATF8 V.32bis or V.32 9600 bps
ATF9 V.32bis 12 000 bps
ATF10 V.32bis 14 400 bps