Page 80 of 910 Features
553-3001-365 Standard 4.00 August 2005
Signaling Server/Voice Gateway Media
Card platform failure:
• A call is established between IP Phones A
and B registered with the same node.
• The LTPS node goes down.
• The IP Phones detect the connection is
lost and periodically try to reregister.
• The LTPS node is up shortly (less than 10
minutes), or an election is called and
another accessible LTPS node acquires
the node IP address. The IP Phones
reregister with the node again.
The call is not lost as the IP Phones
reregister.
The scenario is similar to the TLAN subnet
failure, but the ACF call transition on the Call
Server is instantaneous, since Offline events
are generated in a group as the ELAN subnet
goes down.
Call Server warm restart:
• A call is established between IP Phones A
and B registered with the same Call
Server.
• The Call Server warm restart (INI) occurs.
• The users of IP Phones A and B do not go
on-hook or press any keys during the Call
Server restart.
The call is not lost.
The call is rebuilt after the warm restart and
has the following transitions:
UNREGISTED->HALF REGISTERED->NO
ACF.
The transition is almost instantaneous since
the Online messages are sent in a group as a
response to the Sync Request.
Table 13
ACF behaviors (Part 2 of 8)
Scenario Result