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Caption
0 Table 1 Mode Support
Mode Spacevars 0 product Spacevars 0 series3 Proxy Relay Proxy with local SRTP

How the RTP stream is transferred in Proxy Relay or Proxy with local SRTP Mode

Local Transfer Feature Limitation

When the

Spacevars
0 company

Spacevars
0 product

or 

Spacevars
0 series3

completes a local transfer, the transferee party receives the stream with different RTP header parameter(s) (such as SSRC, timestamp, etc.). This is because the original end point (transferor) is replaced by a new endpoint due to the transfer. Since the RTP stream is passed through by the FPP, there is no re-packetization done for any of the RTP header parameters, and the stream is passed end-to-end transparently.

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To handle the transfer in RTP Proxy mode reliably, the SBC rejects the REFER and raises an event in local register mode.

Refer Pass-through Work Around

REFER pass-through should be enabled by configuring the SBC (see Creating and Modifying SIP Signaling Groups), which forces the transferee to handle the REFER directly.

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