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Strange ARS behaviour on 3300 MCD 4.2

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kwbMitel

Technical User
Oct 11, 2005
11,504
CA
I came across another strange one today. It is definitely not acting the way I would expect and I'm wondering if anyone else has seen this or has some input.

It has to do with ARS that has a list of routes.

System type is MXe II, MCD 4.2, Embedded PRI, Protocol NI-1

- A phone has rights to dial route 1 which is choice 1 in an ARS list.
- A call is made that encounters "unknown signal" from the telco
- The Mitel responds by trying to dial the secondary route.

CCS trace was used to identify the calling pattern.

When ARS Digits Dialled Termination was changed to route 1 (Instead of list) the call responded with "Busy"

When the trunk was manually dialled with the direct trunk select the call was "Busy"

When the same number was dialled using a cell phone the responce was fast busy (what I would call re-order tone)

When ARS was returned to a list, the behaviour returned to it dialling first on the primary route and then attempting the secondary route.

I would never have thought that a signal from the Telco could cause the Mitel to choose a secondary route after failing on a primary. I would only have thought that internal programming would govern the route selection.

Has anyone ever seen anything like this?

**********************************************
What's most important is that you realise ... There is no spoon.
 
My first question would be - is the number being dialed actually a working number? You say that the cell hone gets a fast busy. That would seem to indicate a non working number, In that case when the 3300 sees the carrier "wave off" the call on the first route in the list it would act like the route was unavailable and then go to the next route choice in the list.
 
Well actually, no I do not believe the number to be actually working but that is entirely beside the point.

The system should not take alternative routing based on an external signal.

In this case the alternative route was restricted via COR. The Mitel responded to the call with Toll Deny. As a result a trouble ticket was issued due to a perceived error in programming on the Mitel.

**********************************************
What's most important is that you realise ... There is no spoon.
 
Have you tried to program an alternate second dial tone in the leading digits form to see what happens then?
I suspect that the PRI is not detecting the correct country tones and rolling over to the next route.



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