Of elevator tsib txoj kev intercom peb txoj kev intercom system NBT NKT wired thiab wireless chav tshuab tsheb intercom fais fab thaum muaj xwm ceev

Kev teeb tsa tus qauv intercom tsib txoj kev; 2 chav tseem ceeb (chav ua haujlwm thiab chav computer), 1 chav pabcuam ua ke (lub thawv tswj)
2 lub tshuab pab sab nraud (lub ru tsev tsheb thiab qhov av), 1 lub tswb ceeb toom, 1 lub teeb thaum muaj xwm ceev,
1 qhov chaw muab hluav taws xob thaum muaj xwm txheej ceev
Kev teeb tsa tus qauv intercom peb txoj kev: 2 tus tswv tsev (chav ua haujlwm thiab chav computer), 1 lub tshuab pabcuam ua ke (lub thawv tswj)
1 lub tswb ceeb toom, 1 lub teeb thaum muaj xwm ceev, 1 lub hwj chim thaum muaj xwm ceev
Kev teeb tsa dawb: tuaj yeem teeb tsa dawb raws li cov neeg siv khoom xav tau

Thaum lub teeb thaum muaj xwm ceev tsis tuaj yeem qhib tau
1. Xyuas seb lub teeb ntawm lub teeb thaum muaj xwm ceev puas muaj?

2 Seb qhov polarity puas yog rov qab?
Cov khoom xa tawm tsis tuaj yeem luv luv rau lub sijhawm ntev