[asterisk-dev] Reg call flow of inbound and outbound calls of Asterisk

[Lavanya Chelikam]

Hi,

    I would like to know the call flow of how incoming call is coming from analog phone to asterisk and outbound call from sip userregisterd with asterisk.
   I am looking in to source code of answer(),hangup() applicatios in channel.c and chan_zap.c in Asterisk-1.4.1.  

  Plese suggest me the code call flow of Answer() application.

Thanks & Regards,
Lavanya.