IPPBX extension performance is good, when you need to expand multiple branch on existing PBX phone, most of the old PBX equipment does not support this kind of expansion, must replace the internal module, it is a lot of overhead, and if the IPPBX, with about half of the money is enough, and IPPBX can directly use cheap ordinary analog phone, unlike traditional PBX need expensive with special digital telephone, IP PBX has a very attractive advantages is that it can use its VoIP function with local price dial long distance call, greatly save the cost of long-distance communication,
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