4G cellular modems
are based on LTE wireless network. Industry standard interface is provided ( RS232/RS485/TTL). PPPOE, sending and receiving of SMS English-Chinese messages , CSD data transmission are supported. It is applicable to industry control, free from real-time online, small data size, serial device wireless data transmission or LTE narrowband PPPOE. The products are applied extensively to electric power, environmental monitor, vehicle-mounted industry, hydraulic engineering, finance, street lamp monitoring, heat-supply pipe network, colliery and oil field.
Because the future of wireless database market is unpredictable, the suppliers of chips are faced with a harsh environment. The development cost and variable standards put the traditional hard-wired design of terminal modems into a greater risk. For example, the chips made by suppliers are likely to meet the wrong standard so that finally the solutions are knocked out before publication. More importantly, it is difficult for hard-wired connection to support the flexibility of all standards without repeating silicon technology a lot. Thus, the cost is high and the volume is huge and power consumption is large, which has forced the needs of a programmable project having enough flexibility, multiple supporting standards and shortening development period.