DMR Solution for Cultural Bureau of Kinmen

DMR Solution for Cultural Bureau of Kinmen

Smooths Communication in Tunnel Sightseeing

With the alleviation of the relationship between the mainland and Taiwan, the tunnels and air-raid shelters have been developed by the Cultural Affairs Bureau of Kinmen County into destinations for tourists; therefore, the higher requirements on the emergency communications andrapid response in the tunnels are suggested.
  • User

    User

    Taiwan Cultural Bureau of Kinmen, China
  • Project Time

    Project Time

    2012
  • Market Segement

    Market Segment

    Tourism
  • Products

    Product

    PD78X Portable Radio
    MD78X Mobile Radio
    Hytera dispatch system

Challenge

In the sightseeing tunnels of Kinmen, communication devices in public network like mobile phones cannot work, not even semi-professional walkie talkies; and the humid environment in the tunnel can easily damage the general communication devices. How to maintain the timely and reliable communications in case of emergency is a significant challenge.

Solutions

To ensure smooth communication in the tunnels, the Cultural Affairs Bureau of Kinmen decided to upgrade the communication systems of all the tunnels, and they preferred digital communications. One tunnel of 1km was then selected for trial. 26 points were set in the tunnel, and an emergency communication device would be distributed at each point. A dispatching center should be established outside the tunnel to monitor the communications throughout the tunnel. Thus tourists can use the nearest communication device to call the dispatching center under emergency situations. 4 communication devices were needed outside the tunnel for the patrol personnel.

Hytera focused on the practicality of the solution based on the requirements of the customer.

1. Considering high humidity in the tunnel, PD78X DMR portable radio with IP57 water protection was selected as the communication terminal. A waterproof box in which PD78X would operate was added for better protection and the communication was conducted with the hand-held microphone connecting to PD78X, through out of the waterproof box.

2. The customer wanted the communication terminal operating in uninterrupted stand-by state. The common conventional batteries, however, cannot comply with the requirement due to their limited service time. As a result, Hytera and its agent designed specially a battery box to supply the power directly when being connected to DC, thus such trouble was eliminated for good.

For effective management, Hytera proposed the Hytera dispatch system, and tailored some special functions on the basis of existing software for the project:

1. GPS positioning is not demanded in this project. Instead, it uses map provided by the customer. 26 points distributed evenly in the tunnel. As they are installed in fixed positions, the locations are not necessary to be identified. All the 26 PD78X radios can communicate with the console via individual call.

2. To monitor the terminal status, the console should back-check the status of the radios (on/off line) following the sequence from No.1 to 26 by the Hytera dispatch system. The amount of data required to be processed is limited as only one or two back-checks are needed every day, thus only one MD78X, which acts as a gateway, and one console client are required in this configuration.

3. In addition, there are 4 PD78X to be used by patrol guards. Managed by Hytera dispatch system, they are tailored in consistency with the above 26 radios, yet they only need to communicate with the console.

About Kinmen

Kinmen, governed by the Taiwan, is the strategic stronghold between the mainland and Taiwan. It is located on west side of Taiwan Strait and at southeast of Fujian province across the sea.

With the shortest distance away from the mainland, Mashan (in Kinmen) and Jiaoyu (in Fujian) are only 2,310m apart. For historical reasons, many tunnels and air-raid shelters had been dug in advance.

We couldn't know clearly about the situation in the tunnel in time when emergency strikes by the previous cable telephone for the damage of cable lines due to the humidity in the tunnel. Now the digital wireless system used not only improves significantly the mobility, but also displays the correct position on the computer screen immediately, and the ultra-clear voice quality is unmatched by the traditional communications." “We are very satisfied with and amazed by the products from Hytera, and expect such solution will be promoted and used in the following project.

Leader of Cultural Affairs Bureau of Kinmen County

Implementation

1. The water-proof and moisture-proof problem was solved for the equipment in the tunnel. The similar products used by the customer previously had to be replaced within less than one year due to the humid environment in the tunnel, resulting in excessive expense in cost. Hytera PD78XG radios, are featured with excellent water-proot protection. And the waterproof box designed specially by Hytera further improved its water-proof and moisture-proof protection and saved significantly the cost for the customer.

2. The problem of power supply for the equipment in the tunnel was solved. The battery box designed by Hytera can be connected directly to DC for supply, thus 100% uninterrupted operation of the radios can be guaranteed. The reliability of emergency communications in the tunnel was maximized .

3. The operation and management efficiency is improved significantly due to the Hytera dispatch system customized for this project. Moreover, the emergency handling scheme was rather consistent with the requirements of the customer.

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