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1.9 Automatic Route Selection (ARS) Features
Feature Guide 77
Conditions
WARNING
The software contained in the ARS feature to allow user access to the network must be upgraded to
recognise newly established network area codes and exchange codes as they are placed into
service.
Failure to upgrade the on-premise PBXs or peripheral equipment to recognise the new codes as
they are established will restrict the customer and users of the PBX from gaining access to the
network and to these codes.
KEEP THE SOFTWARE UP TO DATE WITH THE LATEST DATA.
• ARS Inter-digit Time
The inter-digit time used while the PBX is checking the dialled number for the ARS feature can be
specified through system programming ( ARS Inter-digit Time [363]).
• TRS
TRS checks are performed before ARS number modification, so programme TRS Denied Code Tables
and Exception Code Tables accordingly ( 1.8.1 Toll Restriction (TRS)).
• If an extension user makes calls using the Automatic Line Access number, and the leading number of
a dialled telephone number does not match any entries found in the Leading Number, an outside (CO)
line enabled in Automatic Designated Line Access [419] is automatically seized.
• The PBX checks the number repeatedly until 7 digits have been dialled.
• If an extension user makes an outside (CO) line call by directly pressing a Single-CO (S-CO), Group-
CO (G-CO), or Other-CO (O-CO) button or by dialling an assigned Outside (CO) Line Group Access
number, and the seized outside (CO) line has been enabled in
ARS Selection [350], the call is made
with the ARS feature.