Automatic Route Selection
(ARS) for an SX-200-D

Following is an example of how ARS can be setup on a Mitel SX-200-D. The instructions assume that “dial 9” calls access city lines while “87” calls access Tie circuits. Be sure to check how both local and Tie calls are setup before making too many changes to the existing ARS plan.


1) Go to Form-26: Leading Digit Strings:

Define the digits strigs you plan to use or modify the ones already being used. You don't have to be concerned with the field "Restricted COR Group" and can leave it as "UNRESTRICTED".

(Note: If a Restricted-COR-Group Number is entered, callers will receive reorder tone immediately upon dialing an unauthorized access code. If not entered (i.e. left as UNRESTRICTED) , unauthorized callers will be able to dial an access code and telephone number but will receive re-order tone only after completing the dialing sequence).

2) Go to Form-26-Expanded Digits and "show" the digit strings by selecting the F-Key on the bottom of the screen.

Note that:

a) Calls starting with "00" go on Route-1: (These are normally international calls)
b) Calls starting with "0" go on Route-2: (These are normally cellphone calls. Note that "00" is not included in this group)
c) Calls starting with 1-9 go on Route-3: (These are normally local calls)
d) Calls starting with “87” go on Route-5: (These are normally Tie calls)

 

3) Go to Form-23: ARS ROUTE DEFINITION:

Look at the ARS-Route Definition Table (below):

The easiest parts of this table are "Trunk Group" and "Modified Digits Entry".

a) Trunk Group:

According to the table, all CO type calls go out via trunk-group-1. Trunks are defined in form-14 and are assigned to trunk-groups in form-16. Note that routes 1-4 deal with CO type calls and are outpulsed via trunk group 1. Route-5 deals with Tie calls which are outpulsed via trunk group 5. I normally setupTrunk Groups in the following manner:

Trunk-Group-1 = Local City lines
Trunk-Group-2 = DTS (Direct Trunk Select Trunks)
Trunk-Group-3 = Unused
Trunk-Group-4 = Unused
Trunk-Group-5 = Tie Circuits

b) Modified Digits Entry:

Note that the Modified-Digits-Table (form-22) tells the system how many leading digits to delete (and/or insert). If you dial "9" for an outside line you'll want to delete the 1st leading digit which is a "9". If you dial "87" for an Tie, you'll want to delete the first 2 leading digits which are "87". In the table below, Modified-Digits-Table-1 deletes the first leading digit which is a “9”. Modified-Digits-Table-2 deletes the first two leading digits which in this case would be “87” on Tie calls. Other uses of this table include inserting pauses and digits for special carriers (976 numbers, jokes ,etc). The Mitel books give examples on how to do this and other fun things.

c) The most confusing part of the "ARS-Route Definition" table is the COR group definition.

Let's look at it now.

Here’s how the COR Group works. If an extension’s COR is in a COR-Group, it is denied access. Think of it as an allow and deny table.

COR’s and COR-Group Tables can be setup anyway you like in terms of ascending or descending order. I like to set “1” with the most privileges because that’s how Mitel explains it in their books. Also, I’ve found that if a Mitel PBX take a power hit or software glitch, most extensions reset their values to ‘1’ upon rebooting (i.e. Tenants, COS, COR all reset to “1”) If “1” allows outdialing, the location can operate and continue making calls until RIMC help arrives.

Examples of COR usage:

COR-1 Tie + International
COR-2 Tie + National
COR-3 Tie + Local
COR-4 Restricted
COR-5 Unrestricted

A) Extension 2111 has COR=1 and dials 9, 00, 1-202-647-1234

1) Form-26 shows that “9,00” calls should be processed via Route-1.
2) Route-1 determines that the call should go out on Trunk-Group-1 (see form 26)
3) Route-1 shows that Modified-Digits-Table-1 should be used to delete the leading”9” (see form 26).
4) Route-1 shows that COR-Group-1 is used. (see form 26).
5) COR-Group-1 consists of COR’s 2-5, but does not include COR 1. Therefore, the call is processed by the PBX.

B) Extension 2444 has a COR=4 and dials 9, 012, 123-4567

1) Form-26 shows that “9, 0” calls should go out on Route-2 (see Form-26-Expanded).
2) Route-2 determines that the call should go out on Trunk-Group-1 (see Form-26-Expanded).
3) Route-2 shows that Modified-Digits-Table-1 should be used to delete the leading “9” (see Form-26-Expanded).
4) Route-2 shows that COR-Group-2 is used (see Form-26-expanded).
5) COR-Group-2 contains COR’s 3-6. Extensions with COR’s of 1-2 can complete this type of call. Since extension 2444 has a COR=4, it receives re-order tone and is denied access. Call processing stops.

C) Extension 2444 has a COR=4 and dials 87, …

1) Form-26 shows that “87” calls should go out on Route-5 (see Form-26).
2) Route-5 determines that the call should go out on Trunk-Group-5 (see Form-26-Expanded).
3) Route-5 shows that Modified-Digits-Table-2 should be used to delete the leading “87” (see Form-26-Expanded).
4) Route-5 shows that COR-Group-5 is used (see Form-26-Expanded).
5) COR-Group-5 has no COR members and is unrestricted. The call for extension 2444 is processed by the system.

D) Extension 2444 has COR=4 and dials “9 234-5678”

1) Form-26 shows that that “9, 2” calls should go out Route-3 (see Form 26-expanded).
2) Route-3 determines that the call should go out on Trunk-Group-1 (see Form 26-expanded).
3) Route-3 shows that Modified-Digits-Table-1 should be used to delete the leading “9” (see Form 26-expanded).
4) Route-3 shows that COR-Group-3 is used (see Form-26-Expanded).
5) COR-Group-3 contains COR’s 4-5. Since extension 2444 has a COR=4, it receives re-order tone and call processing stops.

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