1. Support GSM900/1800 and 850/1900 MHz or 4-bands optional
2. Connect to a computer by USB port
3. Connection with GSM and PSTN network, the dialed number will call out through the GSM or PSTN network basing on the prefixes of call number. The GSM number will call out through GSM, otherwise other numbers will call out through PSTN. The extortionate bills for the PSTN-GSM connection are avoided and realize the LCR(least cost router) function
4. Call restriction
5. Reverse metering signal and 12KHz and 16KHz selectable

6. DTMF CLIP
7. Call in / Call out / Call waiting limitation function
8. Lock up function: SIM card, network, cell and operated company
9. Local No. / direct No. / limited No. Setting
10. Available for being connected to the PBX as a wireless trunk.