Some telephones, depending on the brand and model, have the intercom function, which allows to begin communication by sending the signal. When the signal comes, the telephone set rings a signal different from the standard ring tone call. After that the telephone temporarily switches off from the telephone line and works as an intercom.
We are Telephony Service Provider for internationals calls. Also we do wholesale termination services special for Romania, France and several countries in Africa and Asia. We provide our clients DID''''''''s and they can use CLI routes.