A PBX phone system or asterisk server running in a remote location to serve as an anonymous relay to yourself and the person you are calling via telephone
I just used a phone proxy from ProxyServices.com and called in a bomb threat to the school, hope they dont turn my docs over to the feds!
The act of complimenting - or complaining - about someone in the locale by calling a friend and voicing your opinion loudly.
<On phone> Yeah, there's a girl on the train with cracking tits, but the twat she's sitting with is playing some R&B crap out his mobile. Glad I can cain him by phone proxy; the fuckjaw can't hear me.