[asterisk-dev] Regarding Asterisk /Zaptel DeviceDriver

[Lavanya Chelikam]

Hi,

   Can any one let me know the call flow  (in asterisk-1.4.0/zaptel-1.4.0) of when we make a call from Analog phone to Asterisk and Asterisk to Analog phone installed digium TDM400P card .
I need the help to find out 
when we make a call from PSTN(Analog phone) which signals are getting loaded into the driver and which functions or structures its calling in zaptel and Asterisk source code.

Please help me regarding this.

Thanks & Regards,
Lavanya.