Confederal Technology Corporation COALMINE CDMA SYSTEM

As a part of daily operations, communication in underground coal mines plays a key role in production and safety. However, a number of communication systems can only provide low quality voice call service in limited area of underground tunnel without data capability. Such systems cannot meet the requirements of coal mines.

MineSafe, Confederal’s premium mine-safety product, is best of breed solution that exceeds most of coal mine users' requirements in terms of communication, radio coverage and safety.

MineSafe is an enterprise-level, IP-based CDMA2000 communication system especially designed for coal mine-safety. The mobile communication solution can cover the whole underground tunnels and provide comprehensive safety initiatives that are required by coal mine operators. It complies with a number of telecom standards and current safety standards for coal mines in China. In November 2008, the system was approved by China Coal Association for mine-safety, and by the end of 2009, it has been deployed in over 10 large scale coal mines in China.

FirstResponse system components are CDMA2000 core network, access network, dispatching center, PTT server, and location and tracking server. The system can be either potable or mounted on a vehicle; both configurations compact and easily deployed.

FirstResponse can be configured with multiple base stations, depending on users’ needs. It can be configured with the following base stations: 1U standard, 500mw micro base stations, and 50mw pico base stations. TD-SCDMA will also be supported.

Technical Specifications

Air Interface: CDMA2000 1X/EV-DO Rev. A

Working Frenquency: 450MHz /800MHz /1900MHz

Frenquency Band: 1.25MHz

User Capacity: 3,000 voice call, 105 dispatching

Packet Data Rate: CDMA2000 1X: 153.6 Kbps/sector, CDMA2000 EV-DO Rev.A: 3.1Mbps/1.8Mbps/sector