(This information is the installation and configuration process of 3CXPhoneSystem and LinksysVOIP. I have personally practiced and successfully achieved the expected results. The content only involves the function of intercommunicating telephones on the local area network through IP. If you want to make calls between different local area networks, you can map the relevant office ports of the PBX (ie 3cxphonesystem host) to the If you need to achieve other functions, you need to purchase this product and consult relevant customer service.)
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