User's Manual 67. Configuration Parameters Reference
Version 6.8 963 Mediant 500L MSBR
67.10.8 Answer and Disconnect Supervision Parameters
The answer and disconnect supervision parameters are described in the table below.
Table 67-60: Answer and Disconnect Parameters
Parameter Description
Web: Wait before PSTN Release-Ack
CLI: wait-befor-pstn-rel-ack
[TimeToWaitForPstnReleaseAck]
Defines a timeout (in milliseconds) that the device waits for
the receipt of an ISDN Q.931 Release message from the
PSTN side before releasing the channel. The Release ACK
is typically sent by the PSTN in response to the device's
Disconnect message to end the call. If the timeout expires
and a Release message has not yet been received, the
device releases the call channel.
The valid value is 1 to 360,000. The default is 6,000.
Note: This parameter is applicable only to Digital
interfaces.
Web: Answer Supervision
EMS: Enable Voice Detection
CLI: answer-supervision
[EnableVoiceDetection]
Enables the sending of SIP 200 OK upon detection of
speech, fax, or modem.
[1] Yes = The device sends a SIP 200 OK (in response
to an INVITE message) when speech, fax, or modem is
detected (from the Tel side, for analog interfaces).
[0] No = (Default) The device sends a SIP 200 OK only
after it completes dialing (to the Tel side, for analog
interfaces).
Typically, this feature is used only when early media
(enabled using the EnableEarlyMedia parameter) is used
to establish the voice path before the call is answered.
Notes:
FXO interfaces: This feature is applicable only to one-
stage dialing (FXO).
Digital interfaces: To activate this feature, set the
EnableDSPIPMDetectors parameter to 1.
Digital interfaces: This feature is applicable only when
the protocol type is CAS.
Web/EMS: Max Call Duration (min)
CLI: mx-call-duration
[MaxCallDuration]
Defines the maximum duration (in minutes) of a call. If this
duration is reached, the device terminates the call. This
feature is useful for ensuring available resources for new
calls, by ensuring calls are properly terminated.
The valid range is 0 to 35,791. The default is 0 (i.e., no
limitation).
CLI: configure voip > sip advanced-
settings > set mn-call-duration
[MinCallDuration]
Defines the minimum call duration (in seconds) for the Tel
side. If an established call is terminated by the IP side
before this duration expires, the device terminates the call
with the IP side, but delays the termination toward the Tel
side until this timeout expires.
The valid value range is 0 to 10 seconds, where 0 (default)
disables this feature.
For example: assume the minimum call duration is set to
10 seconds and an IP phone hangs up a call established
with a BRI phone after 2 seconds. As the call duration is
less than the minimum call duration, the device does not
disconnect the call on the Tel side. However, it sends a SIP