Features: 1) Convenience: no need to dial access numbers, card numbers and PIN codes and get through instantly after direct dialing 2) Swiftness: mute synchronization preemptive dialing technology makes users get through within shortest time 3) Automatism: automatic switch and can automatically choose corresponding IP card according to the opening region 4) Safety: can set up private password and systematic password to prevent others from peculating and modifying system parameters 5) Compatibility: compatible with IP card, local call card, 200 card, 300 card and other network cards 6) Multi-function: suitable for public use, family and company telephones, and extension lines of PABX systems 7) Great capacity: stores up to 9 groups of 60-digit IP card numbers and can store 600 groups of opening regions 8) Remote maintenance: remote programming function