VOIP call establish from unknown number.

[fozlarabbi]

Hi all,

Have a nice day.

I would like to inform you that our PRI link vendor provide this number "0255667788" but few call generate from unknown number like as "0355469788".

So our PRI Link vendor inform us block unknown number.

So Please help me how can secure our PRI Link.

Your kind assistance shall be highly appreciated.

Thanks&Regards

Md. Fozlarabbi

[Chris Deren]

If your voice gateway is SIP or H323 controlled use the "reject voice translation rule":

http://www.cisco.com/c/en/us/support/docs/voice/call-routing-dial-plans/61083-voice-transla-rules.html

Here is a doc on how to achieve the same on CUCM (needed if you are using MGCP):

https://supportforums.cisco.com/document/77241/technotes-how-block-incoming-calls-cucm-8x-based-ani-mgcp-gateway