Ampex Russia
- Internet Telephony Service Provider
- Phone To Phone
- Cisco Systems
- Dialogic Based
- Trabas
- Tario.net
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.
Brama Telecom
Brama Telecom has been offering inexpensive and flexible VoIP services with numerous calling packages both across Canada and USA and abroad.
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