Polycom Version 1.4.x 17 - Manual (Page 147)

Administrator Guide - SoundPoint ® IP / SoundStation ® IP Session Initiation Protocol (SIP)
Copyright © 2004 Polycom, Inc. 139
5.2.3 SIP for Instant Messaging and Presence Leverag-
ing Extensions (SIMPLE)
The phone is compatible with the Presence and Instant Messaging features of Win-
dows
® Messenger ® and MSN ® Messenger 4.7 and Windows ® Messenger ® 5.0. In a
future release, support for the Presence and Instant Message recommendations in the
SIP SIMPLE proposals will be provided:
• draft-ietf-simple-cpim-mapping-01
• draft-ietf-simple-presence-07
• draft-ietf-simple-presencelist-package-00
• draft-ietf-simple-winfo-format-02
• draft-ietf-simple-winfo-package-02
or their successors.
5.2.4 Shared Call Appearance Signaling
A shared line is an address of record managed by a server. The server allows multiple
endpoints to register locations against the address of record.
The phone supports shared call appearances (SCA) using the SUBSCRIBE-NOTIFY
method in the “SIP Specific Event Notification” framework (RFC 3265). The events
used are:
• “call-info” for call appearance state notification
• “line-seize for the phone to ask to seize the line
5.2.5 Bridged Line Appearance Signaling
A bridged line is an address of record managed by a server. The server allows multi-
ple endpoints to register locations against the address of record.
The phone supports bridged line appearances (BLA) using the SUBSCRIBE-NOTIFY
method in the “SIP Specific Event Notification” framework (RFC 3265). The events
used are:
• “dialog” for bridged line appearance subscribe and notify