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TYPE: ATSn?<enter>
where n is the register number.
To modify the value of an S-register:
TYPE: ATSn = r<enter>
where n is the register number, and r is the new register value.
Common AT Commands and S Registers
The following are some common AT Commands. If you require a complete listing
of the AT Command and S Register options, they are sometimes included as text
files in the Installation Diskette or CD-ROM that came with your modem.
A/ Repeat Last Command
This command repeats the last command string entered. Do not precede this com-
mand with an AT prefix or conclude it by pressing Enter.
A Answer Command
This command instructs the modem to go off-hook and answer an incoming call.
Bn Communication Standard Setting
This command determines CCITT vs. Bell standard.
B0: Selects CCITT V.22 mode when the modem is at 1200 bits/s.
B1: Selects Bell 212A when the modem is at 1200 bits/s (default).
B2: Selects V.23 Orig: (75bps trans - 1200bps rec). Answr: (75bps rec - 1200
trans).
B3: Selects V.23 reverse channel ( opposite of B2).
Cn Carrier Control
C0: Transmit carrier always off.
C1: Normal transmit carrier switching.
Dn Dial
This command instructs the modem to begin the dialing sequence. The dial string
(n, the telephone number) is entered after the ATD command.
En Echo Command