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The 

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supports local call forking for up to eight separate destinations. Additionally, the 

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supports up to 20 early dialog responses and 20 calls forked downstream.

SIP Session Licensing

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A SIP session for licensing purposes ("SIP session license") is a call (audio/audio+video) under SBC direction. Details are as follows:

• A SIP session license is a SIP transaction that establishes a bi-directional audio/video media exchange (RTP media stream) between two ports on the SBC.
• To set up the call, the SBC grabs a license token from the purchased SIP session license pool, sets up the call for the bi-directional RTP media stream, and then releases the license token after the call is taken down.
• The media does not have to actually flow through the SBC; the license token is still grabbed to set up the media flow, whether or not the media physically transits the SBC.
• It is possible to consume more than one SIP session license during a single call between two SIP clients. For example, a call that "hairpins" (i.e. one pair of ports supports one RTP media stream through the SBC, and another pair supports a second media stream through the SBC) will consume two SIP session licenses.

SIP transactions that are not directly related to a call setup/tear down are not licensed through the SIP session licenses. Generally, these transactions are free (e.g. SUBSCRIBE, etc.) except when they fall under a chargeable feature. For example, the SBC supports SUBSCRIBE method pass through related transactions (For example, one SIP client to inform another that a message is waiting, etc.) in a way that is limited by available CPU resources, and not by licenses.

Exceptions

A SIP session license is not consumed from the pool of licensed SIP sessions when a SIP↔SIP call has, on all legs (ingress and egress), any one of the following devices identified as the subtended peer:

• SBC Edge (SBC 1000, SBC 2000, and SBC SWe Lite)
• VX
• Tenor

As a result, you do not need to purchase and apply a SIP session license for these calls.

For clarity, please note a SIP session license is consumed when a single leg (ingress or egress, not both) of a SIP↔SIP call has an SBC Edge, VX or Tenor product identified as the subtended peer.Any SIP ↔ SIP call consumes a single SIP session, for the life of the call, within the pool of SIP sessions that have been activated through a license submission.. 

Burst Behavior

If multiple calls arrive simultaneously, the 

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will service the calls until it reaches a CPU usage threshold (~80%).

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