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Hi, Currently i am installing an

Hi, Currently i am installing an

Hi, Currently i am installing an


Currently i am installing an BP250 R13 system with ISDN30.But customer applying the Number Retention Service from the service provider.

The info is as follow

Existing no 12345678 need to port over to the new DDI no 87654321.But i cannot see from the BP250 what is the number & how many digits is coming to the BP250 from the exchange .Therefore i need some help to setup those parameter.BTW i don't understand what is

1. Unknown number  
2. national number on the trunk parameter.

Can someone help.

Thank You.

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