Motorola V.34-SDC, and V.32bis Register 11-DTMF Tone Duration, Register 12-Escape Code Guard Time

Using the AT ACU

S-Register 11—DTMF Tone Duration

Stored in Nonvolatile Memory?:	Yes
Status-Only?:	No
Default Setting:	72
Range:	50 to 255 (country-specific)

S-Register 11 defines the duration/spacing of tones (in milliseconds) in Dual Tone Multifrequency (DTMF) dialing. This register has no meaning unless the Tone Length option under the DIALING OPT’S is set to S11. Refer to Appendix C, Country-Specific Information, for the ranges supported by each country.

S-Register 12—Escape Code Guard Time

Stored in Nonvolatile Memory?:	No
Status-Only?:	No
Default Setting:	50 (1 second)
Range:	0 to 255

This S-Register sets the interval that must be present on either side of the escape code (+++) in order for the modem to recognize the escape command and enter command mode. This prevents the +++ characters from putting the modem in command mode if they are contained in data. The value of S-Register 12 is multiplied by 0.02 to determine the number of seconds. For example, the value of the factory default 50 is one second.

If S-Register 12 is set to 0, the speed at which you enter the escape sequence is not a factor.

S-Register 18—Test Timer

Stored in Nonvolatile Memory?:	Yes
Status-Only?:	No
Default Setting:	0
Range:	0 to 255 (seconds)

This S-Register determines the duration, in seconds, of loopback tests.

With S-Register 18 set to 0, the timer is not operational and tests must be terminated manually. NOTE: S-Register 18’s function is valid only when loopback tests are issued using the AT&T command. S-Register 18 cannot be used to automatically terminate loopback tests if the test is initiated from the front panel.

5-14 Using the AT Automatic Calling Interface