Mobile phones of the system can call and communicate with each other and roam between basestations seamlessly;

It can realize mutual calling and communication of external telephone and mobile phone of the system;

The system supports SMS and group message sending between mobile phones;

Maintenance terminal of the system has functions of maintenance and management;

The system has powerful dispatching functions such as group calling, forced break, forced cut-in, conference and so on;

Talk around function of mobile phone: mobile phones can realize intercom directly or by single baststation;

Video monitoring can be realized by network camera or WiFi wireless camera;

Wireless basestation can extend function of personnel location to identify personnel in mine underground.

System Capacity
2000 mobile phones.
Each I.S. DSL interface can connect with 8 basestations at least, and each basestation can support simultaneous talking of maximum 16 mobile phones.

Transmission Distance
Transmission distance by optic-fiber cable: 15 km between ring net exchanger for surface and ring net exchanger for mine underground, 5 km between ring net exchanger for mine underground and I.S. wireless basestation.
DSL Transmission Distance: 2-core twisted pair is used between I.S. DSL interface and I.S. wireless basestation, transmission distance  3 km
Coverage Range of I.S. Wireless Basestation: 100500 m
MESH Distance of I.S. Wireless Basestation: 200 m

Communication Protocol
Voice Communication: international standard SIP protocol
Wireless Communication: IEEE (802.11b/g)
Wire Communication: TCP/IP, XDSL
Wireless Working frequency: 2.4 GHz
Wireless Modulation: DSSS and OFDM
Security Management: wireless network supports 64, 128 bit WEP/WPA encryption