NEC ELECTRA ELITE IPK II, User Manual

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Document Revision 4C Electra Elite IPK II
2 - 84 Automatic Route Selection
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Hierarchical Class of Service Control
ARS allows or denies call route choices based on an extension ARS Class of Service. This allows
lower Classes of Service (e.g., 1) to access routes unavailable to higher Classes of Service (e.g.,
16). The system provides up to 16 (0=unrestricted, 1~16) ARS Classes of Service.

Separate Routing for Selected Call Types
To provide unique control, you can program separate routing instructions for:

Directory assistance (411, 1411 and 555) calls

Emergency (911) calls

Separate Routing for Equal Access (1010XXX) Calls
Choose different routing for directly-dialed (1 1) and operator-assisted (1 0)
Equal Access calls.
Basic ARS Operation
When a user places an outside call, ARS analyzes the digits dialed and assigns one of 400 Selection
Numbers to the call. The Selection Number chosen depends on which digits the user dialed. ARS then
checks the time of day, the day of week and the extension ARS Class of Service. Based on these call
routing options, ARS selects a trunk group for the call and imposes the Dial Treatment instructions (if
any).
Class of Service Option Allows Outgoing Calls to Not Follow Access Map
Using this option allows a Class of Service to be set so that ARS does not follow the trunk access map
settings (Program 14-07-01 and Program 15-06-01). The feature allows an extension user to have CO
line keys on their telephone which allow incoming access only. The user would only have outgoing
access on the CO lines when using ARS to place a call.
Class of Service Matching
With the ARS Class of Service Match Access feature, you can determine whether the system should
allow a call based on the COS assigned to the Dial Analysis Table (Program 26-02). This change can
create a tenant-like application. It then uses the trunk group defined in the Additional Entry in Program
26-02-03 to place the outgoing call.
When this feature is enabled, the calls are routed in sequential order, and forward provided the Class of
Service for the trunk groups match.
For this feature, Program 26-01-06: Automatic Route Selection Service , COS Match Access is
used.