For the phone companies that brings VoIP system is used, it is considered good by the following factors.• Telephone charges per month within the company are cheap.• Fast and convenient work and coordination with external companies of personnel within the Department of.• Can add a channel in a phone call to an external company to communicate more and more current telephone system that has only 2 pairs of outgoing calls.• People can use the phone outside of the desk itself. Causes of increased functionality.• To be able to remove the IP Phone phones resources of the Department to be able to use the full performance of the device even more.
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