Don't know why 800 numbers aren't working for you. Maybe a temporary glitch? You can use a free tollfree provider for these numbers. Change 2223334444 to the number you want seen as CallerID. Use OBi Expert to make the following changes.
Service Providers -> ITSP Profile D General -> DigitMap:
(18(00|88|77|66|55|44|33)xxxxxxx)
Service Providers -> ITSP Profile D SIP -> ProxyServer:
tf.arctele.comVoice Services -> SP4 Service -> AuthUserName: 2223334444
Voice Services -> SP4 Service -> X_RegisterEnable: unchecked
Voice Services -> SP4 Service -> X_ServProvProfile: D
Physical Interfaces -> Phone1 Port
Add the following to the beginning of the OutboundCallRoute:
{(Msp4):sp4},