we where testing IAD2432 with SIP and it seems we can not make it to support hook-flash functionality. When I dial first number and press flash button I get a second dial tone and first phone conversation is on hold, after dialing a second number when I press flash button I get a third dial tone not a 3-way add hock conference as with traditional PBX like feature and first call gets dropped.
Bellow is the documentation I used to configure those features with SIP:
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...