Context setting

Please let me know that if i have more then two trunks how can calls will originate from trunk specific trunk via context

I am using DISA in freePbx and have more then two sip trunk and how to sett context in DISA to make some calls from one trunk and another calls from different trunk.

the dial plans (outbound routes)?

Thax for the reply i got the answer we can do it with “custom context” thax
but can you help me in IP authentication truk my provider configure my Alcatel device with below IP detail for outbound and In bound can i configure it in my FreePBX.

Alcatel-Lucent Setting
IP 192.168.255.195
sub 255.255.255.224
router 192.168.255.193
TFTP1 192.168.92.246
TFTP2 255.255.255.255

CPU1 192.168.92.246
CPU2 255.255.255.255