I recognize the first two as an ENUM lookup. I would guess the third trial call failed the ENUM lookup for some reason. To always route toll free calls here is what I put in my Smart Calls plan:
Code:
# Pattern Replacement Provider
800 _1800. *${EXTEN} SIP Broker
866 _1866. *${EXTEN} SIP Broker
877 _1877. *${EXTEN} SIP Broker
888 _1888. *${EXTEN} SIP Broker
The priority for these must be placed before your _1NxxNxxxxxx dial plan.