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Avaya IP Office iPhone SIP Client won't establish talk path (RTP Ports) through ASA

Avaya IP Office iPhone SIP Client won't establish talk path (RTP Ports) through ASA

Avaya IP Office iPhone SIP Client won't establish talk path (RTP Ports) through ASA

(OP)
I'm using a Cisco ASA 5505 running IOS 8.4 and ASDM 7.1 trying to open the ports necessary to establish a connection using an iPhone as a SIP client connecting to an Avaya IP Office 9.0 phone system. I have the SIP client running great in the internal WLAN but when I jump to the public side the phone still registers, I can make and receive calls but no audio for either party. I've posted this in the Avaya IP Office forum already but I'm thinking it's a firewall NAT issue or a Service Policy Rule. The port range for the RTP is 49152 - 53246. Any help would be great, just haven't run into anyone doing it yet. Thanks,

RE: Avaya IP Office iPhone SIP Client won't establish talk path (RTP Ports) through ASA

I never got it to work with an ASA without a VPN to the ASA from the phone.

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