Outbound rules/dial plans

What is the fastest and most accurate dial plan for outbound rules to be used with VitalPBX

I have XXXXXXXXXX ans 1XXXXXXXXXX, 911. 

But I notice when Idial the linksys sap3102, there is a 6 second delay before the PSTN Line starts to ring to the caller.

I’ve set up a trunk 1-pstn which sucesfully connects to the FXO port and registers and I can make outbound callsuccesfully. How can I reduce the delay. Reading on google says tht the dial plan is the issue.