What occasion need to use the GPRS DTU?

GPRS DTU referred to as 'GPRS module, which is a wireless version of the serial port server, its function is similar to a serial port server.

using the GSM network operators across the country, by text mode for data transmission. Road on the 8th of way switch input analog input can do 8 way switch alarm output device can be controlled easily operation is simple, practical, and can realize unmanned guard equipment, bring convenience to the enterprise.

1) Site can only be used for wireless communication environment when the scene of the data acquisition equipment need to work on the move, or collect the scene in a field such as cases, unable to provide cable communication environment. This time, the use of GPRS wireless network is likely to be a good choice, as a result of the GPRS network coverage is already very high, most regions of the country have GPRS signal coverage.

2) Site throughout entire transmission interval dispersion due to the GPRS network is a nationwide network of public, so using a ground of GPRS to transmit data is that the patch can step by step across the country, data center and the interval between the scene to collect is not restricted. Wireless public network communication ( Including the GPRS/CDMA network, 3 g network, etc. ) This is very obvious advantage special wireless communication network ( Such as digital radio, WiMax, WLAN, etc. ) Can't reach.

3) The appropriate data real-time requirements of current GPRS network, its data transmission delay for second level range. Doing most of the time, the GPRS data communications evenly overall delay for 2 seconds. That is to say, GPRS DTU end packets sent will reach data center roughly after 2 seconds. On the other hand, from the data in the packet is roughly to GPRS DTU in 2 seconds. GPRS, on the whole, this kind of real time, can meet the requirements of most industry applications. But, for some specific application system, if cannot bear the uniform delay of 2 seconds, then the GPRS communication methods may be inappropriate. （ In addition, CDMA network transmission delay is 1 seconds 2 seconds) 。 From another perspective, if we want to design the system and see through the GPRS network to transmit data, and then in the design of communication protocol when considering the delay situation.

4) The appropriate data communication rate of GPRS DTU and data communication rate of data center is in commonly 10 KBPS - Between 60 KBPS. From that is to say, GPRS DTU can continuously with 10 BPS - At 60 KBPS to send data to the center, and vice versa. （ Added: domestic CDMA network data communication rate can reach 40 KBPS - Around 90 KBPS) Application reliability from the system point of view, we think that when an amount of uniform data communication system itself within 30 KBPS, USES GPRS network for data transmission is more suitable. From another perspective, if we want to design the system and see through the GPRS network to transmit data, you need to control the amount of uniform data communication within 30 KBPS.

4 g network is also quite mature nowadays, wide coverage, if demand can choose 4 g DTU.

here's uniform continuous communication rate and instantaneous communication rate, there is a difference between a serial port baud rate is not the same concept with the device.

above points can be used to determine whether the application system for USES GPRS network for data transmission, if these aspects are in line with the words, then USES the GPRS DTU is very suitable for data transmission.