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

[GoApex]

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,

 

[nnaarrnn]

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