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Chapter 4 - AT Commands, S-Registers and Result Codes
Command:
B n
Values:
Default:
Description:
B0
B1
&BS n Maximum Reliable Block Size
Command:
Values:
Default:
Description:
&BS0 Maximum transmit block size of 64 characters.
&BS1 Maximum transmit block size of 256 characters.
Command:
$BA n Baud Adjust
Values:
Default:
Description:
$BA0 Set baud adjust off, speed conversion on. (Serial
$BA1 Set baud adjust on, speed conversion off. (Serial
&C n
Command:
Values:
Default:
Description:
&C0
&C1
&C2
&C4
Command:
D s
Values:
Default:
Description:
Answer Tone (ZDXI modems only)
n = 0 or 1
0
Select ITU-T V.21. V.22, and V.23 answer tones.
Select Bell answer tones, including Bell 103.
n = 0 or 1
1
n = 0 or 1
0
port speed is independent of modem data rate.)
port speed is same as modem data rate.)
Carrier Detect Control
n = 0, 1, 2, or 4
1
Force Carrier Detect high.
Let Carrier Detect follow carrier signal.
Let Carrier Detect drop on disconnect, then go
high again (for some CBX phone systems).
Reset modem when Carrier Detect drops.
Dial
s = dial string (phone number and dial modifiers)
none
Dial telephone number s , where s may include up
to 60 digits and T, P, R, comma, colon, and
semicolon characters.
31
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