Hello

Here is what i have found about my R&D on pulse dialing.. and want to share this with this group and if there thing is wrong then some body can indicate me if some thing is wrong with my theory


Pulse dialing means making a telephone going ON HOOK, OFF HOOK in a a quick succession for example if you want to dial digits 34 then here is what you will do.

1 = Telephone OFF HOOK
2 = Telephone ON HOOK
- = 50 millisecond delay


1-------2-1-2-1-2-1---------2-1-2-1-2-1-2-1----------2

digit 3 digit 4



8052 is the controller which controls the telephone circuit to go ON HOOK OFF HOOK and provide the appropriate delay (50 Milliseconds).


Shahzad