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Version 6.2 121 December 2010
SIP Release Notes 2. Supported Features
Header Field Supported
Proxy- Authenticate Yes
Proxy- Authorization Yes
Proxy- Require Yes
Prack Yes
Reason Yes
Record- Route Yes
Refer-To Yes
Referred-By Yes
Replaces Yes
Require Yes
Remote-Party-ID Yes
Response- Key Yes
Retry-After Yes
Route Yes
Rseq Yes
Session-Expires Yes
Server Yes
Service-Route Yes
SIP-If-Match Yes
Subject Yes
Supported Yes
Target-Dialog Yes
Timestamp Yes
To Yes
Unsupported Yes
User- Agent Yes
Via Yes
Voicemail Yes
Warning Yes
WWW- Authenticate Yes