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Wednesday, March 16, 2016

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What is REFER Request Extension Method in SIP?

Leke Oyetoke - Wednesday, March 16, 2016


What is REFER Request Extension Method in SIP?

REFER is used by a user agent to refer another user agent to gain access to a URI for the dialog.

1. REFER must have a Refer-To header. This is a compulsory header for REFER.

2. REFER can be sent inside or outside a dialog.

3. A 202 Accepted will trigger a REFER request which shows that other client has accepted the reference.


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