Hello guys,
I have an issue. My cisco phone CP7821 does not ring when someone tried to call from outside. Internal calls it rings and phone is working fine. I am using a the GSM Interface from PSITEK which is connected to a router. I have checked the configuration on the router and it´s pointing to that extension phone but when i tried to call using my mobile or other external line i can hear ringing but the phone (extension) does not do nothing.
Please can you assit on this?
Edson
