Polycom SIP 3.0.2 ユーザーズマニュアル

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Administrator’s Guide SoundPoint IP / SoundStation IP 
B - 10
SIP for Instant Messaging and Presence Leveraging Extensions
• The phone is compatible with the Presence and Instant Messaging features 
of Microsoft Windows
 
Messenger 5.1. 
Shared Call Appearance Signaling
A shared line is an address of record managed by a call server. The server 
allows multiple end points 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
Bridged Line Appearance Signaling
A bridged line is an address of record managed by a server. The server allows 
multiple end points 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