| Description | The maximum waiting delay (Tdmax) timeout value used by the
media gateway to send the Restart In Progress with the
restart method as RM:disconnected to the call agent when
the voice interface associated ds0-group disconnection
condition occurs.
The DS0 group (voice interface) becomes disconnected when
it tries to communicate with the call agent and the
retransmission procedure times out after retrying.
The DS0 group (voice interface) in disconnected state
starts the disconnected timer initialised to the random
value and uniformly distributed between 1 and initial
waiting delay (Tdinit) in seconds.
The gateway waits for either the expiration of the timer,
or the reception of call agent command or the detection
of local user activity for the DS0 group (voice interface).
When the disconnected timer elapses, or when a command is
received from the call agent or when there is a local user
activity, the media gateway sends the Restart In Progress
command with the restart method as RM:disconnected to the
call agent.
If the disconnected procedure still left the DS0 group
(voice interface) disconnected, the disconnected timer
is doubled subject to a provisionable disconnected
maximum waiting delay (Tdmax) in seconds and the gateway
starts the new disconnected procedure again.
Once the maximum value is reached, the subsequent
disconnected Restart In Progress commands use the maximum
waiting delay (Tdmax). |