I am currently manually provisioning a Trio 8800 via the web UI to work with my PBX. I have done multiple SIP v3 and SIP v4 phone without issues on the exact same network. With the Trio 8800, I am experincing port swapping around every 5 minutes. Note that none of the other polycom phones do that. So when the PBX has the correct port information it will make the call, but then at around 4-5 minutes when a call comes in, we are unable to reach the phone untill it's keep alive sends us the new port number.
Any ideas on what settings might cause this? Thank you!