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To create or modify an Entry to a Call Routing Table:
In the left navigation pane, go to Call Routing Table > Entry.
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Click the Create Routing Entry ( ) icon.
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Specifies the Signaling Groups used as the destination of calls.
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Media Mode enables you to choose how the SBC handles call signaling and Audio/Fax media stream during a call. Five options are available: DSP (default entry). The SBC uses DSP resources for media handling (transcoding) but it does not facilitate the capabilities/features between endpoints that are not supported within the SBC (codec/capability mismatch). When DSP is configured, the Signaling Groups enabled to support DSP are attempted in order. To enable a Signaling Group for DSP mode, see Creating and Modifying SIP Signaling Groups. Proxy. The SBC will proxy or switch the media stream between endpoints and let the endpoints negotiate common media capabilities and handle unsupported/unknown audio codecs. The media flows through the SBC without using DSP resources. For example, this mode is used when both inbound and outbound calls are SIP and both Signaling Groups are enabled for Proxy mode. If one Signaling Group has Proxy mode disabled or one of the inbound Signaling Groups is TDM, the call is rejected. Route configuration does not allow Destination Signaling Groups of TDM type if Stream Mode is set to Proxy. The failover mechanism can then be used to re-route to another Signaling Group. We strongly recommend using Proxy preferred over DSP mode since it allows the same routing entry with different Signaling Groups. DSP preferred over Proxy. The SBC prefers to use DSP resources, rather than proxy or switch the media stream between endpoints. This mode is chosen during the call setup based on the call routing, and used for call routes where the inbound call route is both TDM and/or SIP (this avoids duplicate call routes). If the inbound Signaling Group is a SIP Signaling Group not enabled for DSP, then Proxy is used. NOTE: If RTP encryption/decryption is expected, it is necessary to set the Proxy SRTP Handling field to 'Local', so that encryption/decryption is supported when switching to proxy. Proxy preferred over DSP. The SBC prefers to proxy the media stream between endpoints rather than choosing DSP mode (which uses the DSP resource). This mode is chosen during the call setup based on the call routing result, and used for call routes where the inbound call route is both TDM and/or SIP (this avoids duplicate call routes). If the inbound or outbound Signaling Group is NOT in Proxy mode (either SIP signaling group is not enabled for Proxy mode or Signaling Group is TDM), then DSP is used. Direct: The SBC media flows directly between compatible end-points without using either the SBC processor or a DSP resource. Disabled. The Audio/Fax media selection process is disabled. When Disabled is selected, the SBC will reject incoming Audio/Fax streams. |
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Media Mode enables you to choose how the SBC handles call signaling and Video/Application media stream during a call. Proxy. The SBC will proxy the media stream between endpoints. The media flows through the SBC without requiring DSP resources. For example, this mode is used when an inbound SIP call includes Video/Application streams and both inbound and outbound SIP Signaling Groups are enabled for Proxy mode. If one Signaling Group has Proxy mode disabled, the stream is disabled. If the outbound Signaling Group is TDM, the call will be connected using Audio/Fax media only and Video/Application media stream will be rejected.
Direct: The SBC media flows directly between compatible end-points without using either the SBC processor or a DSP resource. Disabled. The Video/Application Stream Mode is disabled. The SBC will not proxy or switch media stream between endpoints. |
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The Proxy SRTP Handling option applies SRTP media encryption to a call; this enables communication between end points that are SRTP incompatible. For example, this enables communication if both Calling and Called user agents both support G.711u codec, but they differ in SRTP capability, or one party in the call does not support SRTP at all. Valid entries: Relay or Local. Default: Relay. This field is displayed only when Proxy, DSP preferred over Proxy, or Proxy preferred over DSP is selected from the Audio Stream Mode drop down list. Relay: When Relay is selected, the following options are supported:
Local: When Local is selected, SRTP is negotiated automatically for the following:
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Specifies whether or not to use media transcoding. Media Transcoding requires a specific Transcoding License. Do not enable Media Transcoding unless your calling configuration requires it and Sonus SBC 1000/2000 and
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Specifies the Media List to use for this call route. This drop down list is populated with the Media List entries created through the Create Media list option. See Creating and Modifying Media Lists. If the Media List configuration selected, then the Destination Signaling Group would be selected that has the common media set available. The media order from the call route's media list takes precedence over the Signaling Group's media list. Generally this field should be kept the default value "None" unless the media codec selection has to be controlled and manipulated for this route. |
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Specifies the maximum average jitter for this rule to be considered for use. |
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