Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

RTP relay

Is there a Cisco solution to relay/translate between RTP sessions? I will have an application which will handle the signalling itself between VoIP end devices but would like to use a professional equipment to connect the medaia streams transported in RTP.


Gyorgy Kracher

Cisco Employee

Re: RTP relay

Not completely clear on the exact application and the network setup. But have a look at IP-to-IP Gateway, which supports the RTP Flow through mode (besides flow around mode), but IP-to-IP Gateway will be involved in the signaling as well:

Another thing you may look into (depending upon your application) is inserting a Firewall in the middle: PIX will modify the RTP/RTCP port numbers in case you use PAT/NAT and VoIP Signaling will be inspected by PIX and modified in case of NAT/PAT.

New Member

Re: RTP relay

Thanks for the reply. This IP-to-IP gateway is something similar what I need, but as I see it cannot be used without signalling.

I am not able to open this link with my CCO account. Can you send the doc in email to

Many thanks again,


Cisco Employee

Re: RTP relay

Try the below URL:

You'll find IP-to-IP Gateway Datasheet, Q & A etc and it should work without any need of a CCO userid. If it still doesn't work, then I can email you the docs.