Phreak.ing – Internet Phone Switch

This appears to be a reference guide for an internet phone system called "Phreak.ing" that lists dial codes and commands for various telephony features. The system includes standard functions like call forwarding (*72), do not disturb (*78/*79), call parking (70-79), and voicemail access (*97/*98), along with conference room access and intercom capabilities (*80/*81). Additional features include caller ID blocking (*67), call return (*69), echo testing (*43), and integration with text and voice chat services.