National Number prefix not displayed on phones when transferring a call

Answered Question
Feb 23rd, 2009

Hello everybody!

We have a customer whose CCM-Cluster is connected to a traditional PBX

via a QSIG E1. The CCM-Cluster has no PSTN-lines, the PSTN-lines are all

in the PBX.

PSTN -----ISDN/E1----- PBX -----QSIG/E1----- CCM.

We are adding a 0 as access code and a 0 for national number type for

incoming PSTN calls to the calling number according to this document:

So we have filled in the 4 number prefix fields and when an external

number is calling a ccm-phone we get the correct number displayed (with

the leading 0s) and the number is also dialable from missed numbers list.

For example : 4234562222 is displayed on phone with 004234562222

But when an external caller is dialing an extension in the PBX and this

extension is transferring the call to a ccm-extension the leading digits

are not prefixed. The number on the display of an ip-phone is 4234562222.

In CCM-trace i can see that the calling party number is sent to

callmanager in a facility-message with correct numbering plan type


CCM-trace shows also that CCM is recognizing it as an national number:

02/18/2009 12:48:42.452 CCM|TRANSFQSIGASN - StructuredOutput:value

CTCompleteRose ::= invoke :


invokeID 2560,

operationValue localValue : 12,



endDesignation secondaryEnd,

redirectionNumber presentationAllowedAddress :


partyNumber publicPartyNumber :


publicTypeOfNumber nationalNumber,

publicNumberDigits "4234562222"


screeningIndicator userProvidedNotScreened


callStatus answered


But the National Number Prefix is not added on the phone display.

Customer has 4.1.3 SR2

I see the same behavoir in my lab with 6.1.3 and another PBX-vendor, so

i do not think it is a bug, i believe it is either an config issue or it

is just not supported.

Any ideas?

I have this problem too.
0 votes
Correct Answer by andreas.eichhor... about 7 years 7 months ago

Yes, we have a feature request running for that but we did not get an information when it will be integrated.

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Overall Rating: 5 (1 ratings)
andreas.eichhor... Mon, 02/23/2009 - 03:55


we have the same problems with our PBX System and UCM 6.1/6.2. The problem ist that the PBX is sending the national/international information in a different IE Field and the UCM ist not able to interpret this information field. Maybe we have a new chance with the 7.0.x Version of UCM because there are some new features with calling number normalization.

philippgrafl Mon, 02/23/2009 - 04:27

OK, that is what i have supposed. Have you confirmed this information by TAC?

Correct Answer
andreas.eichhor... Mon, 02/23/2009 - 04:41

Yes, we have a feature request running for that but we did not get an information when it will be integrated.


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