We are installed asterisk version 1.8 & dadhi version 2.5.1 for sangoma E1 digital card. we can make incoming & outgoing well using (PRI -E1 line : public telephone). directly we gave PRI line to the system. now we need to move into SIP related things and googled more, gone through few articles like below
PRI connection provider need to provide SIP-ID / SIP password?. Please send me any good articles to start SIP basic related things. Note: I have downloaded 3cx softphone to connect asterisk extensions.
 deny=0.0.0.0/0.0.0.0 secret=test6000 dtmfmode=rfc2833 canreinvite=no context=default host=dynamic type=friend nat=no port=5060 qualify=yes callgroup= pickupgroup= dial=SIP/6000 accountcode= mailbox=6000@device permit=0.0.0.0/0.0.0.0 callerid=device <6000> call-limit=50
exten => 67490570,1,Wait(1) ; Wait a second, just for fun exten => 67490570,n,Answer exten => 67490570,n,AGI(IVRS_Language.php)