4-19
Issue 3 April 1994
Table 4-1. AT Command and S-Register Reference (18 of 27)
AT
Command
or
S-Register
Description
\T
n
No Data Disconnect Timer
This command forces the modem to disconnect if no
data is transmitted or received within a specified time
period.
\T0
Disable
\Tn
Sets the No Data Disconnect Timer to value
n,
which varies by country. See Table 4-2 for
acceptable values.
\X
n
XON/XOFF Passthrough Flow Control
This command controls whether or not the modem
passes XON/XOFF characters from the locally
attached computer through to the remote modem.
\X0
Disable (do not pass XON/XOFF)
\X1
Enable
%A
n
Error Control Fallback
This command allows you to change the ASCII value
of the error control fallback character
n to an ASCII
value from 0 to 127. The factory default is 13, an
ASCII carriage return.
%B
n
Modulation/Data Rate
This command sets the modem’s modulation and
maximum data rate.
%B300
V.21 or Bell 103 – max rate 300 bps
%B1200
V.22, V.23, or Bell 212A –
max rate 1200 bps
%B2400
V.22 bis – max rate 2400 bps
%B4800
V.32 bis/V.32 – max rate 4800 bps
%B7200
V.32 bis – max rate 7200 bps
%B9600
V.32 bis/V.32 – max rate 9600 bps
%B12000
V.32 bis – max rate 12,000 bps
%B14400
V.32 bis – max rate 14,400 bps
