Gateway: It connects the interior community to the skin world. It routes calls from the change unit to the native Public Switched Phone Community (PTSN) traces. For instance, when somebody dials an out of doors line, the gateway connects the interior extension to the surface line to complete the decision. PBX primarily includes traces and stations. The traces are connections to the PSTN and Stations are endpoints like fax machines, desk telephones, bank card terminals, and many others. ...
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