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delay in call speech path

Posted on 2010-11-18
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Last Modified: 2013-12-29
Hi there,
I have an ISDN connected to a voice (MGCP) gateway with a number range YYY. Now when users call the external number, they are translated into a 5 digit extension using translation pattern in Call Manager and speech path is established, no issue. now, this site had an old ISDN number range XXX which when called is diverted in the PSTN cloud to the new existing number range YYY on the ISDN. Since some of the customer still dial the old number as it was advertised previously, so we diverted that to this new number range which is being used on existing ISDN. Problem is that there is a 10 second delay in establishing a speech path when Customers from outside call the old ISDN number. Diversion happens fairly quickly as seen from debug isdn q931. So not sure why this extra delay is induced in speech path when users call old number which gets translated to new number. Any pointers for this 1 ? Thanks !
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Question by:nabeel92
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Author Comment

by:nabeel92
ID: 34184728
any help wud be appreciated !
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Author Comment

by:nabeel92
ID: 34185556
Thanks !
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LVL 6

Expert Comment

by:greekstones
ID: 34189558
Hi there

OK

are you translating the old isdn number range ?

what happens here is that when the end user dials the old number the call goes like this  Gateway-->CCM---> Gateway --> and then again CCM. That is  why there is Delay.

The best solutions is to translate the old numbers to internal extentions instead of the DDI. e.g DDI 020777791047 translate it to XXXXX end user extention and the end user will have two extentions old and new translated to one internal extention,

I hope that helps.






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LVL 6

Expert Comment

by:greekstones
ID: 34189580
sorry Correction

The best solutions is to translate the old numbers to internal extentions instead of the DDI. e.g DDI 020777791047 translate it to XXXXX end user extention and the end user will have two DDI old and new translated to one internal extention,


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Author Comment

by:nabeel92
ID: 34193996
At the moment, we are doing translations using translation patterns in Call Manager. Are you saying I should take the diversion off in the PSTN cloud (i.e diversion from old number range to new number range) and instead define a translation pattern for the old number range in the call manager so that those calls land on the gateway as well and then are directly translated into 5 digit extensions ?

At the moment, the old number range is diverted in the PSTN cloud to the new ISDN number range and then translated ? Is it actually possible to make an altogether different number range land on an ISDN on gateway which is already on a different number range (i.e. the new number) ?

Hope I haven't made it that confusing for you -:)
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Author Comment

by:nabeel92
ID: 34193998
So If what I'm assuming is correct, then I do the following

1. Make the Old number range land on the existing ISDN service (even though it already has its own number range) ? Not sure if that's possible.

2. Configure translation pattern in CUCM to convert old number range into xxxxx.
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Accepted Solution

by:
greekstones earned 500 total points
ID: 34195460
No

The Old ISDN range needs to point to the same extention numbers as the new DDI .


E.g

Create a translation Rule in CCM.

New DDI number 020777791048 >>>>910448

Old DDI number 0207444555222 >>>>>>> 910448

regards.

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Author Comment

by:nabeel92
ID: 34201922
Yes, thats what I meant sorry that old and new both will translate to the same extension number.

But don't I need to remove the existing divert from old number range to the new number range in the
PSTN cloud and instead send it to the existing ISDN service (so that both old and new number range) land on the same ISDN from where the CUCM translation pattern translates them into 5 digit extensions.
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