T A L K S W I T C H C O N F I G U R A T I O N
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About carrier codes
A carrier code is prefixed to the phone number dialed by the user. It tells the telephone
company to route the call to an alternative carrier. For example, the carrier code could be a
calling card number and PIN number. ARS determines the carrier code based on the leading
digits and the time of day.
•
Carrier codes can be up to 1–24 characters in length.
•
Carrier codes can include numbers
0
–
9
, “
*
” (asterisk), “
#
” (pound), “
,
” (comma for 2-second
pause), and “
w
” (for wait-for-dial-tone). A 2-second pause is automatically added after
dialing a carrier code.
An entry in the ARS table can have one or two carrier codes.
Carrier code 1
is either used all day,
or from
Start time 1
until
Start time 2
.
Carrier code 2
is used from
Start time 2
until
Start time 1
.
Use of Carrier Selection Prefix and Carrier Codes may require a subscription to a carrier’s
discount calling plan. This service may not be available in some countries and on some
telephone companies’ telephone lines. Carrier Selection Prefix may not be required if a “Pre-
Selection” service is provided by the telephone company.
ARS and direct line access
When Direct Line Access is enabled on a local extension, the user does not have to dial a hunt
group number. Calls placed from that local extension are automatically routed to a designated
hunt group. If ARS is enabled on the designated hunt group, the calls are subject to ARS and
toll restriction.
ARS and the 3-Way Calling/Conference service
The use of the telephone company‘s 3-Way Calling/Conference service is not recommended on
telephone lines when ARS or toll restriction are used. The system’s ARS and toll restriction
features do not have any control over the routing of calls through these telephone
company services.
ARS and emergency service numbers
The telephone numbers in the
Emergency Service Numbers
area will not be blocked by toll
restriction nor redirected by ARS. Calls to these telephone numbers will be routed through hunt
group 9 (0 in some regions).
Planning automatic route selection and toll restriction
1. Identify the leading digits of calls to be blocked by toll restriction.
2. Identify the leading digits of calls to be routed by ARS.
3. Identify which telephone lines and VoIP lines are connected to different service providers.
4. Assign telephone lines and VoIP lines to different hunt groups, in order to provide separate
access to each service provider.
5. Identify carrier codes, which leading digits they work with, and when they will be used.
6. Provide local extensions with access to specific hunt groups. This controls how local
extensions have calls routed by ARS or blocked by toll restriction.
Enter any other local emergency service numbers into the ARS table to ensure calls are routed
to a hunt group with telephone lines that provide access to emergency services.
