5.4
SNM15
AT Command Set Description
Digicom SpA
ATF
Selects the modulation standard that the modem will have to
adopt when it is connected to the remote modem. The choice of
a modulation standard automatically disables the other options;
for example with ATF4 you set the modem to operate only with
the V.22 standard (1200 bps full-duplex).
F0
= Multistandard enabled
F1
= V.21 standard (300 bps full-duplex)
F4
= V.22 standard (1200 bps full-duplex)
F5
= V.22bis standard (2400 bps full-duplex)
ATH
This command controls the telephone switch hook, causing the
modem to go immediately on-hook and terminate a call connection.
H0
= Disconnects the modem from the telephone line, the
line is switched over to the telephone, and if a
connection is going on, this will be broken.
H1
= Connects the modem to the telephone line, the line is
switched over to data.
ATI
Command for the request for internal parameters and memory
tests.
I0
= Request for modem code
I1
= Request for firmware release
I2
= Request for internal memory test
I4
= Request for the family of the modem.
