4-24
Issue 3 April 1994
Table 4-1. AT Command and S-Register Reference (23 of 27)
AT
Command
or
S-Register
Description
S25=
n
DTR Detection
This register determines how much time elapses
between the modem detecting the loss of DTR and the
modem responding to the loss of DTR. This setting is
used to determine the DTR delay required by the &D4
command.
Accepts a value of 0 for Disable, or from 1 to 254 (in
0.1 second increments), or 255 for infinite delay.
S26=
n
RTS-to-CTS Delay
This register sets the length of time (in 10-millisecond
increments) the modem waits after receiving the RTS
signal before issuing the CTS signal to the computer.
Accepts a value from 0 to 255 in 10 millisecond
increments. Factory setting is 0 milliseconds.
S41=
n
Dial-Line Rate
This register determines which modem protocol, along
with its highest data rate, the modem uses for
operation on dial lines. Online changes do not take
effect until a disconnect occurs.
Also refer to the B command for related information.
Accepts the following values:
0, 1 = 14,400 (V.32 bis)
2 = 12,000 (V.32 bis)
3 = 9600 (V.32 bis/V.32)
4 = 7200 (V.32 bis)
5 = 4800 (V.32 bis/V.32)
6 = 2400 (V.22 bis)
7 = 1200 (V.22)
8 = 1200 (212A)
10 = 0-300 (V.21)
11 = 0-300 (103J)
12 = 1200/75 (V.23)
13 = 75/1200(V.23)
