[SIPForum-discussion] Blocking Specific Calling Number from PSTN

qinghao_howard.zhou at bell.ca qinghao_howard.zhou at bell.ca
Wed Jun 16 17:56:39 UTC 2010

Hello all,

As per the call flow below, could anybody guide me through how to block specific calling number from PSTN?
Is it possible that the incoming call could be blocked at voice gateway?  If yes, how?

PSTN -> digital T1 ->SIP voice gateway -> Cisco Call Manager -> corporate user

Thanks in advance,

Howard Zhou

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