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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.
IP Business Solutions
IP Business Solutions, Inc. (IPBS) headquartered in New York, is a communications company backboned with Level 3 service that provides businesses ranging from five to 5,000 employees per location the ability to out-task or completely out-source IT infrast
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