erik malund,
if you charge $90 per hour to write codes then u are the millionare as you take so long to understand the requirement that it may take you 100 days to write codes ....

also if u charge amount why you are here on this forum...trying to get customers...

any ways.. please don't reply to my post ....do something esle .

Lee Cross,
i agree with you but i have done projects.. come one man you know your self writing software for a PBX is not a easy task even for experts in coding.. i can bet on this...

you will find different projects on internet and books related to controller and telephony but none has any thing on controller and PBX software design.. there has to be specifications for deisgning the software..
I promise this forum that when ever i will design the software i will place a website for this so that future people don't have any trouble in facing people like erik malund.

OK....

is there any method which i should follow in order to monitor the bits of off-hook ( HIGH ) and on-hook (LOW) conditions...

only this...nothng else.