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external call 1

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croca

Technical User
May 27, 2004
11
PA
Hi
when I make an external call in call manager delay long time in contacting. As I can fit this time?
 
It sounds like you need a dial plan to suit the country you are in. If we use a simple dial plan here in the UK of 9.@, we will see a 15 second time-out before the call is placed.

This is because Call Manager 3.3.3 only supports the North American Numbering Plan (NANP), and the inter-digit timeout default on CM is 15 seconds.

Call Manager 3.3.4 supports various dial plans (around 8 I think) where you can choose your dial plan before hand, then use your 9.@ match to make calls.

Otherwise, you must build up a long list of matching numbers so that when the Call Manager sees a pattern that matches, it passes the call to the PSTN without waiting for more digits.

This is a real pain for anyone implementing Call Manager in the UK and sickeningly, 3.3.4 only supports the following countries :
(from Japan
Netherlands
Portugal
Singapore
Australia
Russia
New Zealand

This hurts us when making international calls from the UK, because international calls take the form of (in MGCP speak)
9.00XXXXXXXXXX (10 digits after the 00)
9.00XXXXXXXXXXX (11 digits after the 00)
9.00XXXXXXXXXXXX (12 digits after the 00)
9.00XXXXXXXXXXXXX (13 digits after the 00)

Of course that pattern match means that when you dial a 12, 13 or 14 digit international number, you have to wait for the inter-digit time out before your call is placed. Realistically, we might as well compound these route patterns into one 9.00! pattern.

"Common" practise dictates to create a second route pattern with a # on the end, so that the user can type this after his/her number to place the call immediately, but this is pretty lame. We have 500 users here who didn't have to do this on their Mitel phones and here I am trying to tell them Cisco is better and "oh yeah, after every international call, don't forget to 'end' your call with a #, or you'll have to wait 15 seconds for the call to be placed".

Worse still, there exists a bug in CM3.3.3 that prevents the changing of the inter-digit timeout from the default of 15 seconds (at least when you use MGCP gateways, as I recall - I might be wrong). You can change the value all you want, restart your Call managers and it will still wait 15 seconds before timing out.

So, 15 second waits are typical, unless you train all your users to stick a # after every call that isn't local, or you're lucky enough to be able to use the 3.3.4 dial plans.
 
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