Hongdian wireless router was successfully applied to bank ATM self-service terminal project
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Background of the project
With the gradual maturity of 3G wireless services, China Telecom’s EVDO and China Unicom’s WCDMA commercial services have been fully launched, using 3G technology to develop wireless data applications, realizing high-speed and remote access to data terminals, and providing wide-area wireless IP connections. It is suitable for industry and enterprise-level users, and has been vigorously promoted in the self-service terminal business of major banks.
China Guangfa Bank is one of the earliest joint-stock commercial banks established in China. At present, with the expansion of China Guangfa Bank’s business, the convenience and flexibility of self-service transactions have allowed self-service transaction amounts to reach new highs, which has further increased the demand for self-service ATM terminal applications. The traditional private line access cost is relatively high, and the construction of off-line equipment is inconvenient. 3G wireless transmission can get rid of the shackles of cables, and has the characteristics of low equipment cost, safe and reliable data transmission, and flexible and convenient use. It is favored by China Guangfa Bank. . After various investigations, China Guangfa Bank finally chose Shenzhen Hongdian Technology Co., Ltd. as its network solution and wireless router equipment supplier, and the two parties reached a good strategic cooperation agreement.
The Shenzhen Hongdian H7921-3G EVDO router networking solution uses 3G wireless access technology to reduce network construction costs and provide safe, efficient and convenient data communication services for the ATM self-service terminal equipment of China Guangfa Bank.
Technical solutions
1. Scheme topology diagram
Taking the realization of data security and stable transmission as the starting point, Shenzhen Hongdian has carried out reasonable planning and design of the system. Based on the fact that 3G network coverage has not been achieved in some areas or the 3G signal is insufficient, the wireless network terminal of the system design is downward compatible with 2.5G network. Once the 3G network is abnormal, the system can automatically switch to the 2.5G network to ensure the reliability of data link establishment . The program uses China Telecom’s EVDO network to fully meet the needs of bank self-service terminal transaction data.
In this solution, all bank self-service terminals are equipped with Hongdian H7921 3G wireless routers, and the terminals are connected to the system through 3G networks; local and municipal branches access the network through DDN dedicated lines, and all UIM cards used by 3G terminals apply for telecom’s VPDN services. Cards with non-VPDN services cannot log on to the private network, and the entire network structure is logically isolated from the commercial network of the operator, ensuring the stability and security of data transmission.
2. Program features
1) After the device is powered on, it automatically dials without human intervention and is easy to maintain;
2) Provide a Web-based system configuration and maintenance interface, and support remote maintenance;
3) Powerful network management functions, suitable for industry applications;
4) Provide two methods: always-on and dial-on-demand. The dial-on-demand method only establishes a connection with the data center when it needs to transmit data;
5) Use IPSec tunneling protocol, 3DES encryption technology, digital signature, data authentication and key exchange technology to construct a VPN virtual private network;
6) Provide basic routing functions, which can be used for multiple devices to share the Internet;
7) High cost performance, ideal for small and medium business networks;
8) The cost of system transformation is very small;
9) The network is easy to expand;
10) Provide remote upgrade and restart functions.
Project Benefits
(1) Network construction cost
Dedicated line method: Most bank self-service terminals use RS232 interface to connect to the bank data center through a dedicated line after networking. The transmission quality of the dedicated line is higher.
3G wireless transmission mode: As 3G services are charged according to data flow, the data transmission cost of 3G-based bank self-service terminal is very low, and the operating cost is lower than that of wired communication bank self-service terminal system.
(2) Flexibility
The biggest advantage of 3G wireless access is to free the existing bank self-service terminal system from the restriction of the wired communication network. Due to the wide coverage of 3G, the wireless access bank self-service terminal can be applied wherever mobile phones can be used. Various occasions. More flexibly configure bank self-service terminal equipment and expand the scope of credit card services.
(3) Reliability
Hongdian H7921 3G wireless router adopts industrial-grade design, comes with watchdog and remote maintenance functions to ensure the reliability of the equipment; at the same time, H7921-3G EVDO equipment has automatic reconnection when disconnected, WAN port flow detection, ICMP detection Wait for the link recovery mechanism to ensure the normality of the data link. And H7921-3G EVDO is backward compatible with CDMA-1X network, and can switch to CDMA-1X network when the 3G network is abnormal to ensure the reliability of the data transmission link;
Since the self-service terminal is installed in a public place, in order to avoid damage to the antenna leakage, this system uses an unattended antenna, which can be fixed on the self-service terminal casing to avoid damage.
(4) High speed
The transmission rate is high. At present, the actual data transmission uplink rate of EVDO is between 500-800Kbps, and the actual data transmission uplink rate of WCDMA is between 1.5Mbps-2Mbps. Generally, the data transmission volume of each credit card service is between several K to 10Kbps, and the 3G network uplink The transmission rate is far enough.
Project significance
Use Shenzhen Hongdian H7921 3G EVDO router to build a bank self-service ATM communication network system, low construction cost, and realize the safe, flexible and efficient interaction of off-bank self-service equipment business data, improve the bank self-service technology level, and provide self-service for China Guangfa Bank Business expansion provides effective network communication support.
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