Saturday, October 5, 2013

(42) Ringing Circuit (6)


Ringing Circuit (6)
အိမ္တလံုး၏ ringing system , T1 သည္ B2 (or) B3 ကိုၿမည္ေစသည္ S1 two way သည္ B2 နွင့္ B3 ကိုခ်ိန္းနိဳင္သည္
T2, T3, T4, T5, T6, သည္ B1 ကိုၿမည္ေစ၏ 


 

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