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.
Jivetel, established in June 2005 is a fast paced, highly dedicated communications player. Jivetel is a division of GlobeCom International, a global leader in wireless and voice over ip telephony.