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New Member

Skinny over NAT + Cisco 877; fix one-way audio?

Hi,

I have a Cisco 877 where I wish to have an IP phone behind a NAT gateway and a CM cluster which is Internet accessible and I cannot hear the called party but they can call me. Has anybody done this before and could advise what settings I could use to get two way audio? To get the phone to register against the UCM I had to enter a 'no sip service' command to turn off the SCCP ALG.

Is there some sort of NAT support for Skinny on the Cisco platform?

2 REPLIES
New Member

Re: Skinny over NAT + Cisco 877; fix one-way audio?

We have the same problem.

Re: Skinny over NAT + Cisco 877; fix one-way audio?

Hi,

NAT support for SCCP is one of the features available on Cisco IOS.

Have a look at this -

http://www.cisco.com/en/US/docs/ios/12_4t/ip_addr/configuration/guide/htnatalg.html#wp1052543

-> Sushil

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