Panasonic KX-NS300 Basic Specification page 105

การใช้ ง าน External BGM
BGM1 Internal
BGM2 Internal
BGM3 From Analog CO-1
BGM4 From Analog CO-2
BGM5 From Analog CO-3
BGM6 From Analog CO-4
BGM7 From Analog CO-5
BGM8 From Analog CO-6
8-BGM is useful for tenant.
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