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In this section:

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Excerpt Include
Managing SIP Signaling Groupsnopaneltrue
Managing SIP Signaling Groups
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Modifying a SIP Signaling Group

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Configuring a SIP Signaling Group

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Specifies how ringback is played on a channel.

Note
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The Play Ringback configuration functions with only 180 Ringing or ISDN Alert. The function is not executed for 183 w/SDP.

  • Auto: Configured for Auto, the Sonus SBC 1000/2000 operates in the nominal RFC 3960pattern
    • Sonus SBC 1000/2000 generates ringback until in-band media arrives.
    • Sonus SBC 1000/2000-generated ringback is discontinued in the presence of in-band ringback.
    • Additionally, any ALERT is sent with PI=8 regardless of whether or not a SDP was received on the SIP side. Doing so allows the Sonus SBC 1000/2000 to send in-band audio without signaling PROGRESS.

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idPlayRingBackAuto
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Auto — SIP ↔ SIP

Auto — SIP/ISDN ↔ ISDN

  • Always:Sonus SBC 1000/2000 provides ringback, ignoring any arriving in-band media.
    • For SIP-originated call legs, 180w/SDP will be sent to permit Sonus SBC 1000/2000 to provide in-band ringback via early media.
    • For ISDN-originated call legs, ALERT+PI will be sent along with Sonus SBC 1000/2000-inband ringing.

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idPlayRingBackAlways
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Always — SIP ↔ SIP

Always — SIP/ISDN ↔ ISDN

  • Never:Sonus SBC 1000/2000 does not provide ringback and cuts through ringback from the source when/if it arrives.
    • With NEVER, Sonus SBC 1000/2000 will send 180/ALERT to the originating call leg without SDP/PI as in this configuration Sonus SBC 1000/2000 will not supply inband ringback.

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Never — SIP ↔ SIP

Never — SIP/ISDN ↔ ISDN

(info) Note: The Play Ring Back setting is activated only after the channel receives an ALERT or 180 Ringing. Issues with ringback and 183 Session Progress must be addressed using a Message Translation.

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Click to see more information about Activating Play Ring Back.

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The Ringback setting will be activated if a Message Translation's output is ALERT/180.

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The Ringback setting is not used for ISDN-to-ISDN calls when the ALERT contains a Progress Indicator. Sonus SBC 1000/2000 will always set the outgoing PI as it was received.

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Tone Table

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Specifies the Tone Table used by this Signaling Group. Only visible if Always or Auto is specified for Play Ring Back.

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Note

Symmetric NAT (port forwarding) is the only supported NAT type. This NAT configuration type means that packets received on a specific NAT server port are always forwarded to the same Sonus SBC 1000/2000 port, for example, packets on the NAT public IP, port 5060 are forwarded to a private (Sonus SBC 1000/2000) IP, port 5060.

ICE Support

Specifies whether ICE support is enabled/disabled. Enable/disable is displayed only if the Interop Mode is set as Office 365 or Office 365 w/AD PBX.

  • Enable:  When ICE support option is enabled on the signalling group, SBC 1K/2K allows SIP to propose ICE candidates in INVITE and 183/200 responses based on the call direction for that Signaling Group. If no candidate is proposed by the other side, the call proceeds as if ICE was not enabled. NoteWhen Interactive Connection Establishment (ICE) support is enabled, it takes precedence over all other media related NAT configuration.
  • Disable: When the ICE Support option is disabled, SBC1k2k does not support ICE for both incoming and outgoing calls. If ICE is disabled on a Signaling Group and if the incoming offer contains ICE, SBC1K2K responds with no ICE attributes in the SDP.
Note

When Interactive Connection Establishment (ICE) support is enabled, it takes precedence over all other media related NAT configuration.

 

Static NAT - Outbound

If the selected Outbound NAT Traversal is Static NAT, you must enter the field NAT Public IP (Signaling/Media) appears.

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