Telco adding DID numbers what should I be prepared for??

Answered Question
Jul 15th, 2008

AT&T is adding the DID numbers to our PRI tomorrow or sometime this week. In so doing, does anything need to be configured on the CCM system to make this work? When they do add the DIDs to the PRI will this cause any issues in how things are working now? Basically, if we do need to configure CCM for DID, and we wait to do it later, will the PRI and CCM still function ok until then? I do not want to add these numbers to find out the CCM has to be configured at the same time and we have to issues with outgoing calls again.

Any assistance to my paranoid self will be helpful.

I have this problem too.
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Correct Answer by Ayodeji oladipo... about 8 years 6 months ago

Ok. to fully configure your dial-peers you need to know one key thing...the number of digits your telco will deliever to your gateway..

Ig your telco delivers the last 4 digits of teh DID...4000 to 4299

your dial-peer config will look like this

dial-peer voice 4000 voip

destination-pattern 4...

progress_ind setup enable 3

session target ipv4:10.10.10.11 (chnage this to your callmanager address)

dtmf-relay h245-alphanumeric

codec g711ulaw

If your telco delivers 6 digits i.e 964000 to 964299..and you have 4 digit extension as your extensions, then you will need to configure callmanager such that it will strip off the 96 digits..

This is what you have to do

in CCM under the gateway, scroll down to inbound calls and change the significant digits to 4.

Thats all

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Paolo Bevilacqua Tue, 07/15/2008 - 10:21

Hi, you could also have used MGCP with DID, however H.323 or SIP is generally better (more flexible).

you simply change or add a voip DP with the DID range, eg:

destination-pattern 2...$

That is for four digits DID, block of 1000 numbers.

Note; you probably don't need any of these progress_ind commands in you DPs.

Please rate post if it helps!

Paolo Bevilacqua Tue, 07/15/2008 - 10:32

Forgot to mention, you need:

network-clock-select 1 T1 0/0/0

This will eliminate slips and fix fax failure that you might not even know you're having.

Thanks for the appreciation and good luck!

shirwaziri1_2 Tue, 07/15/2008 - 10:32

from the config, do you see any Dial peers with existing DID's? or any DID's. If so, what dial peers?

Ayodeji oladipo... Tue, 07/15/2008 - 10:45

Hi,

From your ocnfig, you are obviously using MGCP.

There are no dial-peers for your existing DIDs.

So with this config, you do not need to configure any dial-peers, as with MGCP you do not need to define dial-peers for routing calls into your callmanager

shirwaziri1_2 Tue, 07/15/2008 - 10:52

we are not using MGCP. We are using H323. Also, I confirmed that currently there are no DID's at all.

My client just purchased the DID's. Based on the DID's below, what would the Dialpeer look like:

DIDs 814-596-4000 through -4299

Correct Answer
Ayodeji oladipo... Tue, 07/15/2008 - 11:03

Ok. to fully configure your dial-peers you need to know one key thing...the number of digits your telco will deliever to your gateway..

Ig your telco delivers the last 4 digits of teh DID...4000 to 4299

your dial-peer config will look like this

dial-peer voice 4000 voip

destination-pattern 4...

progress_ind setup enable 3

session target ipv4:10.10.10.11 (chnage this to your callmanager address)

dtmf-relay h245-alphanumeric

codec g711ulaw

If your telco delivers 6 digits i.e 964000 to 964299..and you have 4 digit extension as your extensions, then you will need to configure callmanager such that it will strip off the 96 digits..

This is what you have to do

in CCM under the gateway, scroll down to inbound calls and change the significant digits to 4.

Thats all

shirwaziri1_2 Tue, 08/05/2008 - 04:58

This is H323 should I be setting this dial-peer "session target for Call manager"

Or should set it for Serial 0/0 which is the T1??

Brandon Buffin Wed, 08/06/2008 - 09:23

The session target should be your Callmanager as this is where incoming calls will be sent.

Hope this helps.

Brandon

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