Panasonic KX-UT133 and Asterisk 11 — how to make make a second call (call waiting etc.)?
Asterisk 11 on a CentOS6, no add-ons, several models of SIP phones
call-waiting is enabled on all call-limit>1 (2,3,10 - depending on the model), was
as a friend, all normally accepted second call, hold call; even the BLF works...
The model Panasonic KX-UT133 - when the subscriber is talking, attempt to score causes it
the response "486 busy here" from the IP phone (not the server) and short beeps as trying
to forward him a call. Recorded for fun a second line
on the same server under a different name - in case of busy line tries to call
the second also produces a "486 busy here".
Where to dig? Native tech support said, "is solved with one line on the server",
but some are silent, as guerrillas.