As the 5G era is approaching, network communication operators are beginning to take on new moves. Recently, China Unicom announced the official closure of the 2G network. There are still many netizens who broke the news: the 2G network in the home is basically out of service. China Unicom's business hall is also holding related activities: 2G old users charge 100 to send 100 to send 3G function machine, charge 300 to send 300 to send 4G smart machine. At present, Henan Unicom has started 2G withdrawal. Some professionals analyzed: The operator shut down the 2G network in order to save costs and better support the 3/4G network. At present, China Unicom's 4G base station is 736,000, 4G users are 105 million; China Mobile's 4G base station is already 1.5 million, which is more than doubled by Unicom. 4G users are even more powerful, up to 535 million! Recently, the state requested to cancel all domestic long-distance roaming charges, which means that Unicom's quarterly revenues will be reduced by 1.58 billion. So whether 5G can play a beautiful turnaround will be the key to the future fate of China Unicom. The 2G retreat can provide better spectrum resources for 4G/5G, which will add icing to China Unicom's 5G road. Previously, as early as June 2014, China Telecom and China Unicom obtained the FDD trial commercial license, and after being allowed to conduct TD/FDD hybrid networking test in 16 cities, in order to ensure the FDD network has higher speed bandwidth, China Unicom began to “ Clear frequency back to the net" action. According to reports, China Unicom's 2G frequency band is lower, and the signal attenuation is slower than that of the high-band signal. Therefore, part of the 2G frequency band is allocated to 4G, which can ensure that 4G has more frequency band resources; on the other hand, it can reduce the number of 4G base stations. Of course, 2G networks have problems such as voice quality and connection time compared to 4G network calls. Secondly, since the GSM system equipment has been used for more than 20 years, it is aging and faulty, and it needs more maintenance than the new network to maintain normal. Many original 2G users have been upgraded to 3G/4G, and 2G users are more and more Less, the actual use of 2G business is also less and less, 2G contributes less and less, and the income earned is difficult to meet the maintenance expenditure, so the quality of the voice service provided is getting worse. It is not impossible to understand, or it is inaudible. On the other hand, for manufacturers who originally manufactured 2G systems, terminals and components, it is difficult to replenish after the market has shrunk or changed production or bankruptcy. The deterioration of 2G communication quality is difficult to avoid. Therefore, weigh the pros and cons of 2G shutdown, only properly shut down, active upgrade is a good way to win-win for operators and users. Unicom is mobilizing mobile network frequency to guide 2G users to migrate to 4G networks and experience high-definition voice and high-speed data brought by 4G networks. The user experience upgrade work ensures that the user's legitimate rights and interests are protected and the user's choice is respected. Right Angle DIP Centronic Connector
Right Angle DIP Centronic Connector.
Current Rating:5A Right Angle DIP Centronic Connector ShenZhen Antenk Electronics Co,Ltd , https://www.antenkcon.com
Dielectric Withstanding Voltage:1000V for one minute
Insulation Resistance:1000MΩ Min.(at 500V DC)
Contact Resistance:35mΩ Max.
Temperature:-55°C to +105°C