This FWT is with the functions showed below:
1. Standard phone socket interface.
2. Caller ID with DTMF
3. Add local area code, IP prefixed code and special code automatically.
4. It is flexible to set whether block or unblock the national long distance call, international long distance call, local mobile call, nonlocal mobile call, local phone call. It is flexible to set whether the call dial out with IP prefix or not.

5. Support locking equipment, locking UIM card, locking network, locking district functions
6. Work well with billing account system by connecting directly.