Description: asterisk document, companies need to use the maximum extent possible, the telephone lines, and this is precisely the use of VoIP with PSTN services would have to do. This means that you need a PBX system to route within the enterprise scheduling. IP PBX system may be expensive, but you can use a low-cost ways to use VoIP PBX functions: open source solutions. The most popular is also to support the best open-source PBX software is Asterisk.
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userguide_chinese.pdf