Troubleshooting some one way audio issues with 3rd party SIP Phones connected via VPN to Call Manager 6.1 experiencing one way audio. I am connected to ASA and do not have SIP Inspection enabled. After reading other posts narrowed it down to a Cisco Client version and recommended getting to Cisco VPN Client 5.X. One problem is that the 5.X is not available for MAC's. So we tried the AnyConnect on the MAC and audio works. The other problem is the versions that is available for the IPPhone does not work. Anyone know when VPN Client 5.X will be available for MAC and when an updated version of VPN Client for IPhone will be available that does not have these SIP issues.