[Asterisk-Users] SIP Trunk please help

[Ryan Pagquil]

Hi,

	I've been setting up asterisk for prepaid use. I'm testing to call a 
SER registered user from the Asterisk just to simulate the prepaid 
calls. Now, I can already contact Asterisk and it prompts me to input 
my call card number and after that I dial in the number I want to 
call (a SER registered device). My question is how can I implement on 
sip.conf to use my SER as the trunk line? So that calls will be 
forwarded to it. Do I also need to register asterisk on SER?How?

Please help!

Thanks,

Ryan