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What can be the reason for selective blocking the RTP packets?

in Acme Packet (MOSC) 6 commentsAnswered

Hello,

I met an issue there is a sip trunk between two Call servers with an SBC in between. A scheme of all the calls from SBC's point of view is always the same - CS A offers IP address of media gateway in SDP, CS B offers its own IP address in SDP. SBC normally forwards RTP in both directions. In case of call to some certain subscriber number SBC blocks RTP packets with an announcement and forwards only real speech of the subscriber B. From subscriber A's perspective this looks

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