Answer and Disconnect Supervision Parameters

'Broken Connection Mode'

configure voip > sip-definition settings > disc-broken-conn

[DisconnectOnBrokenConnection]

Global parameter that defines the device's handling of calls if RTP or MSRP packets are not received within a user-defined timeout (configured by the 'Broken Connection Timeout' parameter) during an established call (i.e., packet flow suddenly stops during the call).

You can also configure this feature per specific calls, using IP Profiles ('Broken Connection Mode'). For a detailed description of the global parameter and for configuring this feature in the IP Profiles table, see Configuring IP Profiles.

Note: If you configure this feature for a specific IP Profile, the device ignores this global parameter for calls associated with the IP Profile.

'No RTP Mode'

configure voip > sbc settings > no-rtp-mode

[NoRTPMode]

Global parameter that defines the device's handling of calls if RTP packets are not received (detected) during early media or upon call connect (i.e., never was RTP) within a timeout. The timeout is configured by the [NoRTPDetectionTimeout] parameter.

You can also configure this feature per specific calls, using IP Profiles ('No RTP Mode' parameter). For a detailed description of the global parameter and for configuring this feature in the IP Profiles table, see Configuring IP Profiles.

Note:

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If you configure this feature for a specific IP Profile, the device ignores this global parameter for calls associated with the IP Profile.

'Broken Connection Timeout'

configure voip > sip-definition settings > broken-connection-event-timeout

[BrokenConnectionEventTimeout]

Defines the timeout interval (in 100-msec units) after which a call is disconnected if RTP packets are not received during an established call (i.e., packet flow suddenly stops during the call).

The valid range is from 3 (i.e., 3 x 100 = 300 msec) to approx. 2684354 (i.e., 74.5 hours). The default is 100 msec.

Note:

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The parameter is applicable only when the 'Broken Connection Mode' parameter is configured to Disconnect.

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For this feature to function, you also need to disable silence suppression.

configure voip > sbc settings > no-rtp-detection-timeout

[NoRTPDetectionTimeout]

Defines the timeout interval (in msec) after which a call is disconnected or re-routed if RTP packets are not received within the interval.

The valid range is 0 to 50000. The default is 0, which means that this timeout feature is disabled and that the device doesn't disconnect the call due to packets not being received.

Note:

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The parameter is applicable to the 'Broken Connection Mode' and 'No RTP Mode' parameters.

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If a call is already established and RTP exists and at any stage during the call packets are not detected for a user-defined interval (configured by the 'Broken Connection Timeout' parameter), the device disconnects the call or routes it to an alternative destination, configured by the IP Profile parameter 'Broken Connection Mode'.

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The parameter is not applicable to MSRP and direct media calls (see Direct Media Calls).

'Timeout to Establish MSRP Connection'

configure voip > sbc settings > msrp-connection-establish-timeout

[MSRPConnectionEstablishTimeout]

Defines the timeout (msec) for establishing MSRP connections.

The timer starts from when the device opens the MSRP media socket (port). If the timeout expires and the connection wasn't established, the device does one of the following:

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Ends the SIP session.

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If you've enabled the Broken Connection feature, the device searches for an alternative route in the IP-to-IP Routing table. For more information, see the IP Profile's 'Broken Connection Mode' parameter in Configuring IP Profiles.

The valid value is 10000 to 120000. The default is 10000 (i.e., 10 sec).

For more information, see Configuring Message Session Relay Protocol.