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.
Glamore Telecomm inc
Myphonefree is a low cost telecommunications service provider based in Dallas, Texas. We use VoIP technology to carry voice calls from your regular phone ( wireline or wireless), IP phone (SIP or H.323), or PC phone (softphone) to another phone. We have r
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