Aastra Telecom 9143i Series User Manual

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Advanced Operational Features
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41-001160-03, Rev 00, Releaes 2.4 
IP Phone Administrator Guide
Update Caller ID During a Call
It is possible for a proxy or call server to update the Caller ID information that 
displays on the phone during a call, by modifying the SIP Contact header in the 
re-INVITE message.  The phone displays the updated name and number 
information contained within the Contact header.
The following parameter allows the system administrator to enable or disable this 
feature:
sip update callerid:
This parameter is configurable via the configuration files only.
Configuring Update Caller ID During a Call
Configuration Files
For the specific parameter you can set in the configuration files for enabling/disabling the update of caller ID 
during a call, see Appendix A, the section, 
 on 
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