User manual

AT COMMANDS: DATA MODEM 2-7

H – Switch Hook Check (Replace Handset)

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 com-

mand, 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 Gives the Product Code

ATI1 Gives the ROM test total

ATI2 The test total is calculated and compared with the value stored in

the ROM (Message is OK or ERROR)

ATI3 Gives the ﬁrmware version

ATI4 Gives the name of the device

ATI5 Gives the Country Code

ATI6 Gives the Data Pump model

L – Volume Level of Connected Loudspeaker

You can connect a loudspeaker to the modem, to enable you to follow acoustically

as the connection is established and data are transmitted.

ATL0,1 Low volume (factory setting)

ATL2 Medium volume

ATL3 High volume

➮ The volume can also be adjusted at the modem itself.

M – Switching the Loudspeaker On and Off

ATM0 Loudspeaker is always OFF

ATM1 Loudspeaker is ON until the carrier signal is recognized (factory

setting)

ATM2 Loudspeaker is always ON

ATM3 Loudspeaker is OFF when dialling and after carrier tone recognition

N – Recognizing Type of Modulation

This command commands the automatic recognition of the type of modulation.

ATN0 Automatic recognition not authorised. The Handshake is carried out to the

value of S37. Where S37=0, the Handshake is set to the interface speed

ATN1 Automatic recognition is authorised (as F0)