For example, if A calls B and the same transfers the call to a third user C, the field of the Called Phone A does not update correctly.
I tried to use the value sendrpid = yes in sip.conf fil but nothing to do about the caller does not update the display.
SIP can see the traces of the values correctly update sent.
I was testing this feature cone of the phones series Snom300.
I tried to look at this post:
wiki.asterisk.org/wiki/display/ … nformation
but honestly I could not figure out how to manipulate the update of the caller id to the caller.