What are the networking methods of DTU

GPRS general wireless packet service (GPRS) is a wireless packet switching technology based on GSM system, which provides end-to-end, wide-area wireless IP connection. GPRS makes full use of the Shared wireless channel and USES IP Over PPP to realize high-speed and remote access of data terminals.

The networking of GPRS wireless monitoring system is relatively simple. 4G DTU can directly connect with user devices through rs-232 or rs-485 interface.

Data terminal (4G DTU) access: GPRS users can choose CMNET and APN access network, CMNET is usually used for public users, APN for industry users, usually in a group, users need to set user name and password, better security. In addition, APN users can apply for fixed IP addresses tied to mobile intranets.

Data centers are a little more complex to network. According to the application field of GPRS, we provide various application forms of data center networking scheme for reference of developers. The choice of network form is mainly decided by the amount of service data, reliability requirement, data confidentiality and network condition.

Scheme 1: 4G MODEM access mode (monitoring center is used as data terminal to bind fixed IP address)

This scheme is suitable for enterprises that have no access to Internet and have high security requirements. Suitable for applications with low data bandwidth requirements, such as data acquisition system using Polling transmission protocol; All data runs in the GPRS network. Direct communication between all 4G terminals is required; Fixed IP address of GPRS data terminal access point in data center. (i.e. at least one SIM card with fixed IP address)

Scheme 2: Internet access (the monitoring center accesses wireless network via the Internet)

Enterprises have stable and permanent access to the Internet; The router port address of the enterprise end and the IP address of the monitoring center should be public and provided by the ISP that provides Internet connection for the enterprise. In this case, the client should first apply to the Internet operator for fixed IP of the public network. The center USES the public network to fix IP, and the monitoring point initiates the connection directly to the center. Or the client company has a server connected to the Internet and has fixed IP of the public network. However, considering the stable operation of the server, other application software is usually not allowed to be installed on the server. Therefore, the GPRS data center system cannot be installed on the server.

This scheme is good in real-time and stability, but the cost of using public network fixed IP is relatively high.

Scheme 3: private line access mode (the monitoring center is connected to wireless network via DDN private line)

This kind of scheme is suitable for enterprises not having access to Internet or considering high security, and it is suitable for financial, securities, industrial monitoring and other industries. When enterprises access China mobile's routers through special lines, the access routers at the client end must provide public IP addresses.

Scheme 4: dynamic IP solution

For the application system without fixed IP, the networking mode is the same as "fixed IP access".

For more details Visit: https://www.e-lins.com/EN/routers/4g.html