User's Manual

E – Echo Function
The E command determines whether the modem will issue an echo of the
command which is entered.
ATE0 Echo disabled
ATE1 Echo enabled (factory setting)
H – Switch Hook Control (Replace Handset) – Go "On Hook"
The H command will break off the existing telephone line connection (the
modem “hangs up”) and the connection to the remote modem is cut off. After
the H command, any other commands in the same line are ignored.
=> This command can only be entered after an existing data link has been
quitted by using the Esc sequence.
I – Firmware Information
ATI0 Report product code
ATI1 Modem chip firmware version #
ATI2 Verifies ROM checksum
ATI3 Reports chipset name
ATI4 Reserved
ATI6 Country Code
L – Volume Level
The loudspeaker enables you to follow acoustically as the connection is
established and data are transmitted.
ATL0,1 Low speaker volume
ATL2 Medium speaker volume (factory setting)
ATL3 High speaker volume
M – Switching the Loudspeaker On and Off
ATM0 Speaker always OFF
ATM1 Speaker on until carrier present (factory setting)
ATM2 Speaker always ON
ATM3 Speaker OFF during dialing, and on until carrier
2-6 AT COMMANDS: DATA MODEM