Ositech comm Trumpcard Data/Fax Modem S9 Carrier Detect Response Time, S11 Dtmf T one Duration

Modem Command Reference

Default2

Sets the length of time to pause when the modem encounters the "Pause During Dial" call progress feature, i.e., the comma (,).

S9 — Carrier Detect Response Time

Range	1-255 tenths of second
Default	6 (0.6 seconds)

Determines how long a carrier signal must be present before the modem recognizes it as a carrier and turns on /RLSD. As this time is increased, there is less chance to detect a false carrier due to noise from the telco line.

S10 — Lost Carrier To Hang Up Delay

Range	1-255 tenths of a second
Default	14 (1.4 seconds)

Sets the length of time the modem waits before hanging up after a loss of carrier. This allows for a temporary carrier loss without causing the local modem to disconnect. When register S10 is set to 255, the modem functions as if carrier is always present.

The actual interval the modem waits before disconnecting is the value in register S10 minus the value in register S9. Therefore, the S10 value must be greater than the S9 value or else the modem disconnects before it recognizes the carrier.

S11 — DTMF T one Duration

Range	50-255 milliseconds
Default	95 milliseconds

Sets the duration of tones in Dual Tone Multifrequency (DTMF) dialling. This value has no effect on pulse dialling.

S12 — Escape Code Guard Time

Range	0-255 fiftieths of a second
Default	50 (1 second)

Sets the time delay required immediately before and after entering the escape code. The time interval between the sending of the first and second, or the second and the third escape code characters must be less than the value of the guard time.

User’s Guide and Reference 4 - 39