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.
Formed in 2000 by an experienced telecom team, iOnosphere is a privately held company with significant capital investments from Pharos Capital Partners and the Trelys Funds. During our short history, iOn has developed an outstanding reputation in the indu
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