Interconnect, and the extension of the extension which is inside enterprise and organization and the device and the equipment or switch-board which exchanges the outside line. Case of the machinery, even PLASTIC BONDED EXPLOSIVE (private branch exchanger) and PABX (private automatic branch exchange) you call.
Usually, as it is installed in the building enclosure of enterprise organization, controls the company internal extension, besides the fact that it was connected with the private line, through PLASTIC BONDED EXPLOSIVE and the public circuit of base, connecting with the switchboard of central telephone exchange, it makes arrival and departure trust possible. With digital PLASTIC BONDED EXPLOSIVE, besides the fact that dial in, colorful function of the reservation, transfer and shortening dial and the call-back etc. is offered, it is utilized even in the LAN construction and the like which utilizes the extension circuit. In addition, in product for coal center, ACD and there are also some where the function of CMS (call management system) and the like is installed.
As for PLASTIC BONDED EXPLOSIVE in addition to the fact that price is high, it is necessary to install in every base which introduces the extension system. Because of that when to multi bases it converts, as for increase of introduction operational cost there was a demerit that it is not avoided. Such vis-a-vis PLASTIC BONDED EXPLOSIVE of conventional type, IP-PBX which with respect to IP network it offers & manages has been observed the functionof the private branch exchange.
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