Digitmap advice

I currently have a Callcentric SIP trunk hooked up to a Polycom 550 phone. I’m looking to configure another trunk (pstn from my cablevision optimum voice) to another extension to this phone that is hooked up to my asterisk pbx via a SPA3102.

Callcentric requires me to hit 1xxxxxxxxxx for outgoing calls therefore I needed to have the following digitmap:

I’m looking for some guidance as to what I should make the new digitmap be to support my future multi-trunk configuration.

Any tips would be greatly appreciated.

In FreePBX each trunk can have individual dial manipulation rules.

Have the phones present to FreePBX in a standard 10 digit format then add the appropriate digits in the trunk.