AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN - Manual (Page 635)

6-8 41-001343-01 Rev 03, Release 3.2.2
On the transferor phone, the REFER request will always be sent to the transferee.
Configuring SIP Message Sequence for Semi-Attended Transfer
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 customizing the semi-attended transfer
method, see Appendix A, the section, “
Semi-Attended Transfer Settings ” on page A-237.
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,
“Update Caller ID Setting.” on page A-237.