Technical information

Call Routing
9-2 Issue 7 June 2001
The system checks the calling permissions of the originator’s COR to see if the
COR of the originator is allowed to call the COR of the destination dialed. If the
COR of the originator is set to
y for the COR of the destination, the call will
complete. If the COR of the originator is set to
n for the COR of the destination,
the intercept tone is returned to the caller.
Example: User dials 2. Digit nine is defined as feature access code for ARS. More
digits will follow. As the digits are dialed they are checked against the ARS
analysis table until a unique match is found. When the singular match is found, a
check is made to see if a route pattern is identified. If a route pattern is not
identified, the call is routed to intercept. If a route pattern is identified, the call is
routed to that pattern.
When the call reaches the route, the trunk group identified as the first choice is
checked for an available member. If a member is not available, the next choice in
the pattern is checked for an available member.
When an available member is found, the FRL of the originating endpoint is
checked against the FRL of the choice selected. If the FRL of the endpoint is
greater than or equal to the FRL on the choice, the call completes. If the FRL is
less than all the choices in the route pattern, intercept is returned to the caller.