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switching with out using analog switch

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waqar

New Member
I am looking forward to design a simple small size pbx with following specifications:-

two extensions and one external telephone line.

now in the above case there are only 3 lines so using mt8816 like analog switch is not an economical thing to do ..is there any way by which switching can be done with using analog switch like using transistors etc...


iam using At89c52 controller.
 

M.Shakeel

New Member
waqar said:
I am looking forward to design a simple small size pbx with following specifications:-

two extensions and one external telephone line.

now in the above case there are only 3 lines so using mt8816 like analog switch is not an economical thing to do ..is there any way by which switching can be done with using analog switch like using transistors etc...


iam using At89c52 controller.
my project is really a economical solution, without analog switch
 
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