Telephone circuit simulation

[Nanya]

Hello Guys,

I am trying to simulate a small micro-processor controlled PABX on ISIS-Proteus...eveything seems to be OK. But can someone tell me what I can use to substitue for the telephone set which I am to use to as the hook switch and the keypad...I am thinking of simple SPST relay for the hook switch and a simple keypad for the buttons????

Does anyone have anything better for me??

Thanks.
Nanya

 

[Gordz]

Problem is how accurate to do you want the simulation to be ? Are you using both pulse and tone or only tone ?

 

[Nanya]

Yes, I want a very high degree of accuracy in my simulation and i am working with only tone. Please, help mi out.

Thanks

 

[Gordz]

For accuracy you should set up a small tellephone network by using actual handsets. However, if you are unable to do so you would have to 'create' a touch tone dialer and tone decoder. Both are possible using a PIC, just Google for tone dialer with PIC micro.