[Serusers] External Calls Through Ser & Asterisk !!!

Hi everyone, I'm trying to make a call, based on, when a certain user auths my SER by mysql, if he dials "1", SER forwards the INVITE to Asterisk, The user dials "1" to open external calls and then the wanted number, doing this Asterisk forwards again to Go2call VoIP Server with a certain username and password, in order to auth my user and close the Tunnel, making the Call possible. What I want to know is that if its possible, or am I crazy !! I thinking of doing this by the following way: 1. Configure a Certain [context] block with the lines below at extensions.conf: a) Context "Go2Call_Calls": Extensions Description 1 Mark b) exten => <external_phone_number>,1,Answer exten => <external_phone_number>,2,Playback(tt-weasels) exten => <external_phone_number>,3,VoiceMail(45) exten => <external_phone_number>,4,Hangup 2. Configure a peer at sip.conf in order to my asterisk can talk to my SER Sip Proxy: [<external_phone_number>] type=peer username=<external_phone_number> insecure=yes canreinvite=no context=Go2Call_Calls mailbox=<external_phone_number> host=dynamic Will it work ??? Does it work this way, or am I getting crazy ? Is there anyone who have already made that ? I'm gonna be doing this till I get our Telecom Sip Numbers to company from our Telecom Provider. Anyone ?? -- Felipe Martins Linux System Administrator Tep Solution Provider Mundivox Communications Rua Lauro Muller, 116/Sala 505 RJ - Brasil - 22290-906 Tel.: 55 21 3820-8839 Fax.: 55 21 3820-8844