Not only voice communication between driver and dispatcher but also some essential data service need to be transmitted through by Hytera Mobile radio, including passengers announcement and external train SCADA most-varied of data (e.g. position, status).

Furthermore, As turnkey supplier, Hytera is in charge of the overall responsibility for integration of the mobile radio system , including connection to the signalling system, tunnel supply and migration.

Besides, Hytera needs to face below problems:

· Integration of TETRA system to new control center;

· Migration of the network and control center during Metro operation;

· Project management between TETRA system, on board unit, train supplier, end user and integrator in the country.

2 redundancy switching nodes and 4 Base station cover 30 Km circle line, with 6 repeaters to ensure the region enjoys an optimum supply underground. 

A total of 76 train radio sets are installed in train radio sub-racks to offer both voice and data service for dispatcher and drivers. 

With 5 workplace dispatching system, operator could make use of a comprehensive range of functions such as, e.g. SDS dispatch or various calls.