Multi-Tech Systems MT128ISA-UV - Manual (Page 25)

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Chapter 3 - AT Commands
MT128ISA/PCI
Chapter 3 - AT Commands (Win 98 Only)
Introduction
AT commands are the means by which you and your communications software are able to communicate with
and configure your ISDN adapter. These commands enable you to establish, read and modify parameters
associated with your ISDN connections, line protocols and call handling. The following provides a list of the AT
commands recognized by Multi-Tech’s MultiModem ISDN terminal adapters.
Where indicated below, the AT prefix must be issued with the command. The AT command tells the modem
“ATtention!, commands to follow”. If you issue AT as a command by itself, the adapter should respond OK,
indicating that your cables are connected correctly and your baud rate is set properly.
AT commands are entered in HyperTerminal mode or can be issued as an extra setting for your connection.
Use Start>Settings>Control Panel>Modems>ISDN Modem>Properties>Connection>Advanced>Extra
settings.
Commands and Descriptions
ATA Answer an incoming call
ATBn Select protocol of transmission in B channel
ATB0 64K HDLC (default with universal modems under Win95)
ATB20 V.120 Async.
ATB21 V.120 Sync.
ATB3 X.75 Transparent, the same as ATB30 (default with ISDN X.75 Transparent modem under Win95)
ATB30 X.75 Transparent
ATB31 X.75 T.70 NL
ATB32 X.75 ISO 8208
ATB4 Async PPP to Sync PPP converter (default setting with Win95 Async to Sync PPP modem)
ATB41 Async to Sync PPP conversion in ML PPP mode, compatible with Microsoft ISDN Accelerator pack
ATB42 Async to sync PPP conversion to MLPPP
ATB43 Async to sync PPP conversion in MLPPP+BOD (bandwidth on demand)
ATB6 Async to sync PPP conversion over X.75 transmission
ATB61 Async to sync PPP conversion over X.75, but setting up secondary device in Dial-Up Networking
required.
ATB62 Async to sync PPP conversion in MLPPP over X.75
ATB63 Async to sync PPP conversion in MLPPP+BOD over X.75
ATDs Dial a telephone number
ATDL Dial the last number
ATD7693007 Dial telephone number 7693007
ATEn Echo characters when in command mode
ATE0 Echo off
ATE1 Echo on ( default )
ATHn On-Off Hook
ATH On-Hook, Disconnect (same as ATH0)
ATH1 Off-Hook
ATI Display version number, selected protocol, packet size, connected speed, MSN, and outgoing call
number.
ATO On-Line command, switch to on-line from command mode
ATQn Return the result code
ATQ0 Return the result code (default)
ATQ1 Does not return the result code
ATSr Set or display the register value
ATS0=1 Set register 0 to 1, (S0=0 default, disable the auto-answer mode)
ATSr? Display register content