Hold Implementation; Reliability Of Provisional Responses; Transfer; Third Party Call Control - Polycom SoundPoint IP 601 Administrator's Manual

Administrator Guide - SoundPoint
Response
606 Not Acceptable

5.1.5 Hold Implementation

The phone supports both currently accepted means of signaling hold. The first
method, no longer recommended due in part to the RTCP problems associated with it,
is to set the "c" destination addresses for the media streams in the SDP to zero, for
example, c=0.0.0.0. The second, and preferred, method is to signal the media direc-
tions with the "a" SDP media attributes sendonly, recvonly, inactive or sendrecv. The
hold signaling method used by the phone is configurable (for more information, see
4.6.1.1.3 SIP <SIP/> on page 73) but both methods are supported when signaled by
the remote endpoint.

5.1.6 Reliability of Provisional Responses

The phone fully supports RFC 3262 - Reliability of Provisional Responses.

5.1.7 Transfer

The phone supports transfer using the REFER method specified in draft-ietf-sip-cc-
transfer-05 and RFC 3515.

5.1.8 Third Party Call Control

The phone supports the delayed media negotiations (INVITE without SDP) associated
with third party call control applications.
® ®
IP / SoundStation IP
Supported
No
Copyright © 2005 Polycom, Inc.
Session Initiation Protocol (SIP)
Notes
147