AT Commands

53

AT command formats

B1 Selects Bell 212A when the modem is at 1200 bps.

B2 Unselects V.23 reverse channel.

B3 Unselects V.23 reverse channel.

B15 Selects V.21 when the modem is at 300 bps.

B16 Selects Bell 103J when the modem is at 300 bps.

Result Codes:

OK

n = 0,1,2,3,15,16

ERROR Otherwise

Dn Dial

This command instructs the modem to dial a telephone number. Enter n (the telephone number and any modifiers) after the ATD command.

Any digit or symbol (0-9, *, #, A, B, C, D) may be dialed as touch-tone digits. Characters such as spaces, hyphens, and parentheses do not count. They are ignored by the modem, but you may want to include them to make the number and modifiers easier to read.

The following may be used as phone number modifiers:

P Pulse dialing.

S=n

Dial using the string saved by &Zn command.

T Touch-tone dialing (default).

,Pause during dialing. Pause for time specified in Register S8 before processing the next character in the dial string.

WWait for dial tone. Modem waits for a second dial tone before processing the dial string.