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Avaya: CM/Aura (Definity) FAQ

ARS Tables

What is an ARS table & how do I modify mine?
Posted: 15 Oct 02

Adding a new Exchange to Definity


With the rise of wireless there are frequent changes to the list of valid exchanges.  Keeping up with these changes can be challenging.

You can update the list of valid exchanges on the Definity by modifying your (defined) ARS table.  When users dial 9 to get an outside line, the number they dial is compared with allowed/disallowed numbers on the ARS table. Improper routing of local exchanges can result in increased long distance charges.


Commands Used
disp ars an # Display ARS analysis #  - To View the ARS table (where # = the first or first two digits of the exchange in question)   e.g. disp ars an 55

cha ars an # Change ARS Analysis # - To Change the ARS table (where # = the first or first two digits of the exchange in question)   e.g. disp ars an 55

disp rout #  Display Routing Path - To view the Routing Path
  
 
Steps
Collect the latest exchange information from your local phone company, long distance carrier or the phone book.  It’s usually typed in the front.  (see URLS below).  You can also work with your providers to supply a quarterly update of NPA/ NXX numbers.

From the command line, type disp ars an # to view your ARS table.  Note – the # you type for the exchange should be the first or first and second digits.  e.g. (503) disp ars an 50 will display 500 through 520. (The version of your Definity will dictate how many NXX digits are displayed)

Look for an exchange that is already routed as a local call and record it’s route path.  Verify that the route path is local by typing disp rout pa #.

As you find exchanges that need to be added type cha ars an # and enter the new exchange and routing path.  Note – You can use the right column to enter new exchanges.  Exchange numbers do not have to be entered in numeric order, the switch will auto sort them.

When finished check your work by dialing a number in the exchange on a phone with a display so you can see if it goes out as a local or long distance call.  (Assumes you have your lines appearances programmed to show local vs. long distance)

Definitions
Exchange
Your exchange (also known as your prefix) is the three digits immediately following your area code as in (###) 722-####.

Your Home Exchange includes all of the phone numbers in your immediate community, which share the same local calling area.

Some exchanges may also be pay-per-call exchanges. Calling these numbers will result in a charge on your phone bill as set by the information provider.

Home Exchange
Your Home Exchange includes all of the phone numbers in your immediate community which share the same local calling area. Your exchange numbers (also known as your prefix) are the three digits immediately following the area code — as in (###) 722-####.

The Home Exchange is always a part of your local calling area, though your local calling area may include additional exchanges and surrounding communities.

Your area code and prefix are also identified by (NPA / NXX)

Links to find Exchange numbers:
http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=calling+prefix
http://www.hwcn.org/link/lca/npa.html
https://www.legallocate.com/npa.htm

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