如今，存在的信息也显示通过3cx助理，然而，BLF仍然是一个非常受欢迎的功能，本文介绍BLF是什么和如何在苏州工业园区范围内的工程。
Nowadays, presence information is also displayed via 3cx Assistant, however BLF remains a very popular feature. This article explains more about what BLF is and how it works in SIP context.
如今，存在的信息也显示通过3cx助理，然而，BLF仍然是一个非常受欢迎的功能，本文介绍BLF是什么和如何在苏州工业园区范围内的工程。
Nowadays, presence information is also displayed via 3cx Assistant, however BLF remains a very popular feature. This article explains more about what BLF is and how it works in SIP context.
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