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Data Addendum Host-Based Controller Modem
June 15, 1998 AT Command Set
AT Command Reference (continued)
Version 1.0 Lucent Technologies Inc.
21
\Tn Inactivity Timer
This command specifies the length of time (in minutes) that the modem will wait before disconnecting when no
data is sent or received. A setting of zero disables the timer. Alternatively, this timer may be specified in register
S30. This function is only applicable to buffer mode.
\T0: Inactivity timer disabled (default).
Result Codes:
OK n = 0 - 255
ERROR Otherwise
\Vn Protocol Result Code
\V0: Disable protocol result code appended to DCE speed.
\V1: Enable protocol result code appended to DCE speed (default).
\V2: Same as \V1.
Result Codes:
OK n = 0, 1
ERROR Otherwise
\Xn XON/XOFF Pass Through
\X0: Modem process XON/XOFF flow control characters locally (default).
\X1 Modem passes XON/XOFF flow control characters.
Result Codes:
OK n = 0, 1
ERROR Otherwise
-Cn Data Calling Tone
Data Calling Tone is a tone of certain frequency and cadence as specified in V.25 which allows remote
Data/FAX/Voice discrimination. The frequency is 1300 Hz with a cadence of .5 s on and 2 s off.
-C0: Disabled (default).
-C1: Enabled.
Result Codes:
OK n = 0, 1
ERROR Otherwise
-V90 = <n> command to enable/disable V.90 and change downstream rate
-V90=0 will disable V.90
-V90=1 will enable V.90 Auto Rate (default value)
-V90=X - controls the downstream rate
-V90? - Shows the current value
-V90=? - Shows the range [0-21]
See next page for the values of n.