6Xx Responses - Global Failure; Hold Implementation; Reliability Of Provisional Responses; Transfer - Polycom SoundPoint IP 300 Administrator's Manual

Administrator's Guide - SoundPoint

5.1.4.6 6xx Responses - Global Failure

Response
600 Busy Everywhere
603 Decline
604 Does Not Exist Anywhere
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 directions with the
"a" SDP media attributes sendonly, recvonly, inactive or sendrecv. The hold signaling
method used by the phone is configurable (for more information, refer to 4.6.1.1.4 SIP
<SIP/> on page 88) but both methods are supported when signaled by the remote end
point.

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
Yes
No
No
Copyright © 2006 Polycom, Inc.
Session Initiation Protocol (SIP)
Notes
169