System installation instructions:

• N+1 wire system is used for wiring, and the household line is two-core wire. The size is ≧0.12 square.
• Extension second line into the household, regardless of positive and negative, one extension failure, does not affect the other extension.
• The extension can select the ring tone. In the host ringing state, residents can press the unlock key to select their own extension ring tone (16 ring tones are optional), if not selected, the host will randomly select the extension ring tone.
• Self-check function is perfect, there is a fault sound prompt.
• Power supply voltage normal operating range 11V to 15V, more than 15V will damage the system.

System installation drawing