Answer and Disconnect Supervision Parameters

'Answer Supervision'

configure voip > gateway analog fxo-setting > answer-supervision

[EnableVoiceDetection]

Enables the sending of SIP 200 OK upon detection of speech, fax, or modem.

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[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).

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[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 by the [EnableEarlyMedia] parameter, is used to establish the voice path before the call is answered.

Note:

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The parameter is applicable only to the Gateway application.

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FXO interfaces: The feature is applicable only to one-stage dialing (FXO).

'GW Max Call Duration'

configure voip > sip-definition settings > gw-mx-call-duration

[GWMaxCallDuration]

Defines the maximum duration (in minutes) per Gateway 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, where 0 is unlimited duration. The default is 0.

Note: The parameter is applicable only to the Gateway application.

'Disconnect on Dial Tone'

configure voip > gateway analog fxo-setting > disc-on-dial-tone

[DisconnectOnDialTone]

Determines whether the device disconnects a call when a dial tone is detected from the PBX.

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[0] Disable = (Default) Call is not released.

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[1] Enable = Call is released if a dial tone is detected on the device's FXO port.

Note:

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The parameter is applicable only to FXO interfaces.

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This option is in addition to the mechanism that disconnects a call when either busy or reorder tones are detected.

'Send Digit Pattern on Connect'

configure voip > sip-definition settings > digit-pttrn-on-conn

[TelConnectCode]

Defines a digit pattern to send to the Tel side after a SIP 200 OK is received from the IP side. The digit pattern is a user-defined DTMF sequence that is used to indicate an answer signal (e.g., for billing).

The valid value is up to 8 characters.

Note: The parameter is applicable only to FXO.

'Broken Connection Mode'

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

[DisconnectOnBrokenConnection]

Global parameter that defines the device's handling of calls if RTP packets are not received within a user-defined timeout, configured by the [BrokenConnectionEventTimeout] parameter. You can also configure this feature per specific calls, using IP Profiles (IpProfile_DisconnectOnBrokenConnection). For a detailed description of the parameter and for configuring this feature in the IP Profiles table, see Configuring IP Profiles.

Note: If this feature is configured for a specific IP Profile, the settings of this global parameter is ignored 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., RTP 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 if the [DisconnectOnBrokenConnection] parameter is configured to [1].

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Currently, the feature functions only if Silence Suppression is disabled.

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

[NoRTPDetectionTimeout]

Defines the timeout interval (in msec) after which a call is disconnected if RTP packets are not received within the interval. The timer begins from call setup and if no packets are received when the timer expires, the device disconnects the call.

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

Note:

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If a call is already established and there is RTP, if at any stage during the call RTP packets are not detected for a user-defined interval, configured by [BrokenConnectionEventTimeout], the device disconnects the call, or routes it to an alternative destination, configured by the [IpProfile_DisconnectOnBrokenConnection] parameter.

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

'Disconnect Call on Busy Tone Detection (CAS)'

configure voip > gateway analog fxo-setting > disc-on-bsy-tone-c

[DisconnectOnBusyTone]

Global parameter enabling call disconnection upon detection of a busy tone.

You can also configure the feature per specific calls, using Tel Profiles (TelProfile_DisconnectOnBusyTone). For a detailed description of the parameter and for configuring the feature in the Tel Profiles table, see Configuring Tel Profiles.

Note:

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The parameter is applicable only to the Gateway application.

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If the feature is configured for a specific Tel Profile, the settings of the global parameter is ignored for calls associated with the Tel Profile.

configure voip > interface fxs-fxo > default-linepolarity-state

[SetDefaultLinePolarityState]

Defines the FXO line polarity, required for DID signaling.

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[0] = Positive line polarity

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[1] = Negative line polarity

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[2] = (Default) Auto - The device detects the polarity upon power-up or upon insertion of the RJ-11 cable, and uses it as a reference polarity.

Typically, if the RJ-11 cabling is connected correctly (without crossing, Tip to Tip, Ring to Ring), the Tip line is positive compared to the Ring line. In this case, set the parameter to 0. With this configuration, the device assumes that the idle line polarity is Tip line positive.

When the device receives a SIP INVITE, it checks the FXO line polarity. If the polarity is "Reversed", it skips this FXO line and goes to the next line.

Note:

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For the parameter to take effect, a device reset is required.

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To take advantage of this new feature, configure all FXO lines as a single Trunk Group with ascending or descending channel select mode, and configure routing rules to route incoming INVITE messages to this Trunk Group.

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The parameter is applicable only to FXO interfaces.

'Enable Polarity Reversal'

configure voip > sip-definition settings > polarity-rvrsl

[EnableReversalPolarity]

Global parameter enabling the Line Polarity Reversal feature for call release.

You can also configure the feature per specific calls, using Tel Profiles (TelProfile_EnableReversePolarity). For a detailed description of the parameter and for configuring the feature in the Tel Profiles table, see Configuring Tel Profiles.

Note:

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The parameter is applicable to FXS and FXO interfaces.

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If the feature is configured for a specific Tel Profile, the settings of the global parameter is ignored for calls associated with the Tel Profile.

'Enable Current Disconnect'

configure voip > sip-definition settings > current-disc

[EnableCurrentDisconnect]

Global parameter enabling call release upon detection of a Current Disconnect signal.

You can also configure the feature per specific calls, using Tel Profiles (TelProfile_EnableCurrentDisconnect). For a detailed description of the parameter and for configuring the feature in the Tel Profiles table, see Configuring Tel Profiles.

Note:

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The parameter is applicable to FXS interfaces.

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If the feature is configured for a specific Tel Profile, the settings of the global parameter is ignored for calls associated with the Tel Profile.

configure voip > interface fxs-fxo > polarity-reversal-type

[PolarityReversalType]

Defines the voltage change slope during polarity reversal or wink.

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[0] = (Default) Soft reverse polarity.

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[1] = Hard reverse polarity.

Note:

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The parameter is applicable only to FXS interfaces.

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Some Caller ID signals use reversal polarity or Wink signals, or both. In these cases, it is recommended to configure the parameter to [1] (Hard).

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For the parameter to take effect, a device reset is required.

configure voip > gateway analog fxs-setting > fxs-ntt-polarity-reversal

[FXSNTTPolarityReversal]

Enables the device to comply with the NTT Japan standard for line polarity reversal for IP-to-Tel calls (FXS).

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[0] = Disable (Default)

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[1] = Enable

Note:

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If this parameter is enabled, the device ignores the [EnableReversePolarity] and [TimeBeforeReorderTone] parameters for IP-to-Tel calls.

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The parameter is applicable only to FXS interfaces.

configure voip > interface fxs-fxo > current-disconnect-duration

[CurrentDisconnectDuration]

Defines the duration (in msec) of the current disconnect pulse.

The range is 200 to 1500. The default is 900.

Note:

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The parameter is applicable for FXS and FXO interfaces.

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For the parameter to take effect, a device reset is required.

[CurrentDisconnectDefaultThreshold]

Defines the line voltage threshold at which a current disconnect detection is considered.

The valid range is 0 to 20 Volts. The default is 4 Volts.
Note:

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The parameter is applicable only to FXO interfaces.

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For the parameter to take effect, a device reset is required.

configure voip > interface fxs-fxo > time-to-sample-analog-line-voltage

[TimeToSampleAnalogLineVoltage]

Defines the frequency at which the analog line voltage is sampled (after offhook), for detection of the current disconnect threshold.

The valid range is 100 to 2500 msec. The default is 1000 msec.

Note:

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The parameter is applicable only to FXO interfaces.

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For the parameter to take effect, a device reset is required.