1. Network Announcements with SIP
IETF 56
Eric Burger
19 March 2003
draft-burger-sipping-netann-05.txt

2. Open Issue: Media on Hold
What Does Media Server Do When It Receives Hold Requests? [RFC3264]
Option 1: Suspend Play; Time Stops for VoiceXML
Option 2: Time Moves Forward (Same as PSTN)
Option 3: Invoker Specified
Option 4:
a:sendonly/recvonly Silently Play Media (no RTP); Time Moves Forward
a:inactive Suspend Play (Better than PSTN?)
Call Waiting Interaction w/IVR
Not An Issue w/ Early Media
Propose Option 1
19 March 2003
draft-burger-sipping-netann-05.txt

3. Open Issue: 409 Result Code
487 Reserved for Response to CANCEL
Virtual CANCEL idea didn’t fly
Would 480 Be Better?
Looks like out of resource, but
Distinct from 503
Only Issue for annc
Proposal: New Result Code
409 REQUEST REJECTED
The UAS has, for whatever reason, rejected the request. Use cases for this result code include the user at the UAS explicitly rejecting the request (e.g., releasing the call before answering) or to terminate a session that occurs before the session is fully established.
19 March 2003
draft-burger-sipping-netann-05.txt

4. Open Issue: Multiple Media Streams
Netann describes a mechanism with associating a single URI for play or IVR with the given SDP.
What about audio and video?
Associate SDP m=lines with URI parameters
Embed play/script targets in SDP
Punt
Not an issue if play URI is a composite object (e.g., MPEG-2 or MPEG-4)
Is this is predominant use case?
19 March 2003
draft-burger-sipping-netann-05.txt

5. Planned Changes for –06 Show full early media exchanges (OK to PRACK)
VoiceXML Keywords w/o Values Generates 404 With Explanation
Eradicate stray 487’s
Describe Overload Behavior (503)
19 March 2003
draft-burger-sipping-netann-05.txt