User`s manual

U.S. Robotics I-modem Command Reference
Controlling EIA-232 Signaling • Page 6-4
To change the DSR pulse time (in 20-second increments), set S-register 24.
(See Appendix
A, Alphabetic Command Summary.)
Carrier Detect
Carrier is another way of saying Òready signal from the device on the other end of the con-
nection.Ó Under normal conditions, the I-modem sends a Carrier Detect (CD) signal in
response to receiving the carrier from the device on the other end.
&Cn Control how the I-modem sends the CD signal.
&C0 CD always ON.
&C1 Send CD normally: The I-modem sends a CD signal when it connects with
another analog device, and drops the CD signal when it disconnects.