Page History

This Best Practice details the local transfer feature limitation when 

Spacevars
0 product

passes through an RTP stream in Proxy Mode.

How the RTP stream is transferred in RTP Proxy Mode

Local Transfer Feature Limitation

When the Sonus 

Spacevars
0 product

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.

...

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.

Pagebreak