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  1. stevelup

    Cisco NAT mixup behaviour changes between IOS version

    Yes, I can turn that off, but then we get no audio at all. In the fault condition, we get one way audio. I would be happier with the Cisco SIP helper out of the equation completely but could not get it working without it.
  2. stevelup

    Cisco NAT mixup behaviour changes between IOS version

    Mixup was supposed to read fixup...!
  3. stevelup

    Cisco NAT mixup behaviour changes between IOS version

    Hi We have a Mitel 3300 sat behind a Cisco 2811 router. NAT is unavoidable unfortunately, but everything has been working 100% reliably over the past few years. We have an issue with the Cisco router in that there is a bug in the release we are using, so need to upgrade IOS on it. The problem...

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