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.
Wiztel Inc.
WizTel`s is a highly reputable telecommunications (VoIP) services provider very active in the global wholesale market. Wiztel has forged a high value supply pool and a robust delivery platform to provide high volume, high quality wholesale services at com
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