Air Port Extreme - SIP/VoIP compatibility

[beemer832]

I am having some issues getting a Mac Air Port Extreme to pass SIP information while using VoIP phones. Is there a setting that disables SIP transformation or provides constant NAT? Do these devices have a SPI firewall built into them? Is there a new firmware version that takes care of these issues?

Thanks
Josh

[beemer832]

the problem that I am having is I have three VoIP phones attached to this device and the router is altering the SIP header information and causing random call quality issues. I need to resolve this SIP header altering to allow the phones to contact their server correctly.

[beemer832]

Can someone maybe direct me to some screen shots of the air ports UI? Also is there a way to configure remote access/administration into this device?

Thanks
Josh