GRNVoip Philippines
- International VoIP Wholesale Provider
- Call Routing VoIP Solutions
- Cisco Systems
- Custom Open Source Billing Solution
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.
iCall System Limited
iCall is a computer program that runs on your Microsoft Windows® computer or mobile device such as an Apple iPhone®, Nokia, Motorola, Sony Erickson Other.
iCall looks and feels just like a regular phone, but instead of using a phone line, it uses your
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