Avaya Communication Manager Administrator's Manual page 433

Establishing Administered Connections
The originating server or media server attempts to establish an AC only if one of the following conditions
exist:
•
AC is active.
•
AC is due to be active (either a permanent AC or time-of-day requirements are satisfied if it is a
scheduled AC).
•
Originating endpoint is in in-service or idle state.
If the originating endpoint is not in service or is idle, no activity takes place for the AC until the endpoint
transitions to the desired state. The originating server uses the destination address to route the call to the
desired endpoint. When the server establishes two or more ACs at the same time, Communication
Manager arranges the connections in order of priority.
AC attempts can fail for the following reasons:
•
Resources are unavailable to route to the destination.
•
A required conversion resource is not available.
•
Access is denied by class of restriction (COR), facilities restriction level (FRL), or bearer
capability class (BCC). Or, an attempt is made to route voice-band-data over SDDN trunks in the
public switch network.
•
Destination address is incorrect.
•
Destination endpoint is busy.
•
Other network or signaling failures occur.
In the event of a failure, an error is entered into the error log, which generates an alarm, if it is warranted
by your alarming strategy. You can display AC failures via the status-administered connection command.
As long as an AC is due to be active, the originating server continues to establish an AC unless the
attempt fails because of an administrative error (for example, a wrong number) or service-blocking
condition (for example, outgoing calls barred).
•
The frequency with which failed attempts are retried is determined by the administered retry
interval (1 to 60 minutes) for each AC.
•
Retries are made after the retry interval has elapsed regardless of the restorable attribute of the
AC.
•
ACs are retried in priority order.
•
When you change the time of day on Communication Manager, an attempt is made to establish all
ACs in the waiting-for-retry state.
Administrator's Guide for Avaya Communication Manager
November 2003
Managing Data Calls
Administered Connection
433