Well, there seems to be an issue with the RIL in FRX07.
I'm not sure if the bug that was found will resolve your issue. Is it reproducible? Does it happen every single outbound call...? If so, it'll be a lot easier to trace/troubleshoot.
hyc's post mentions the bug that was resolved.
Basically download ril2 from
post #6. I'm gonna be lazy and direct you to another thread for the remainder of the explanation - follow the steps to bind mount or use the attached froyo.user.conf.
Directions thread - has some other jibberish in there related to another issue, you can ignore the kernel stuff. Let me know if it helps.