How to change Incoming Calling Party Subscriber Number Prefix - MGCP

Unanswered Question
Oct 24th, 2009

Hi,

I've just installed a 2811 MGCP Gateway on a remote site in another country and have hit the incoming calling party prefix issue where the inbound local call gets a 100 put in front from the main site ccm.

Is there a way to stop this from happening on the remote site?

As this is a MGCP gateway there are no dial-peers to manipulate.

Any clues how to get around this?

I dont see anything in the gateway for this as its inbound calls that are affected.

I have this problem too.
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virverma Sun, 10/25/2009 - 04:47

With new versions of CallManager and for calls coming from a q931 gateway,

this is possible to achieve under the Clusterwide Parameters (Device - PRI

and MGCP Gateway) section, in the service parameters for Cisco CallManager.

They are:

National Number Prefix-This parameter defines the number that is

prefixed to an incoming national number and provides a means to help

identify national numbers, if necessary. This parameter allows you to prefix

specified digits to the calling number of an inbound call based on the Type

of Number field in an inbound offered call (ISDN SETUP message). For

example, a national call from 4085551212 can be assigned the prefix 91.

The

maximum length is eight digits, and the allowed values are 0 through 9, #,

and *.

*

International Number Prefix-This parameter defines the number that is

prefixed to an incoming international number and provides a means to help

identify international numbers, if necessary. This parameter allows you to

prefix specified digits to the calling number of an inbound call based on

the Type of Number field in an inbound offered call (ISDN SETUP message).

For example, an international call from 456789 can be assigned the prefix 9

011. The maximum length is eight digits, and the allowed values are 0

through 9, #, and *.

*

Subscriber Number Prefix-This parameter defines the number that is

prefixed to an incoming subscriber number, and provides a means to help

identify subscriber numbers, if necessary. This parameter allows you to

prefix specified digits to the calling number of an inbound call based on

the Type of Number field in an inbound offered call (ISDN setup message).

For example, a subscriber call from 1212 can be assigned the prefix 9.

The

maximum length is eight digits, and the allowed values are 0 through 9, #,

and *.

*

Unknown Number Prefix-This parameter defines the number that is

prefixed to an incoming unknown number and provides a means to help identify

unknown number types, if necessary. This parameter allows you to prefix

specified digits to the calling number of an inbound call based on the Type

of Number field in an inbound offered call (ISDN SETUP message). For

example, an unknown call from 5550123 can be assigned the prefix 7. The

maximum length is eight digits, and the allowed values are 0 through 9, #,

and *.

Note: These prefix values are added to numbers in missed or received

incoming calls based on the inbound Q.931 call type value. These prefix

values always need to match what the Telco requires in order to place the

call. This method only applies to Q.931 gateways. As for all other Cisco

CallManager versions, the National Number Prefix can be set to 91 and

International Number Prefix can be set to 9011.

Please be aware that these changes might affect the current calls going

throug hence apply these changes in off working hours.

clougher01 Sun, 10/25/2009 - 13:34

Yeah the issue that i have is that i dont see any option to change the incoming calling party for the new gateway setup in another country.

So the inbound local call has a 100 prefixed to it because the CCM in the other country sees it as an international call.

mcecilia Mon, 10/26/2009 - 07:58

Hello,

Try to use an intermediate partition.

For Example:

PRI ->> DummyPartition Calling Search Space

The create a Translation Pattern or Tranformation Pattern in the Dummy Partion that leaves Called the Same and changes Calling.

Good Luck

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