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.
PT GERBANG DATA LINTAS BENUA was established in early 2000 and is a subsidiary company of the THP Group. The company is based in Jakarta, Indonesia and also operates an associate company domiciled in Melbourne, Australia.