I have a customer with a 7200s V4.99 with an OAS card V2.10. They have a remote user with an SMT-5210 phone v1.54 that is getting no audio on the speaker. Her phone will not ring. Her phone works fine on the handset and headset. I set up another phone in my shop hooked to their system, tested it and sent it to her and the same problem. Other remote users are working well. Does anyone know if the speaker phone uses different ports then the handset? I had her forward port 9000-9001 UDP through her router to the phones IP but no change.