RS232 GPRS DTU MODEM “ LT501 ”series DTU supports China Mobile’ GPRS network and China Telecom’s CDMA1X network. In 2009, Linkto will also provide ECOM to support TD-SCDMA and WCDMA,to provide high speed, always online, stable and transparent transmission service. This product is specially developed for applications in Power System automation, Water irrigation supervision and report, industrial production supervision, transportation management, financial system, securities and outdoor advertisement and so forth. LT501 DTU Uses GPRS/CDMA 1x network platform to transparently and virtually transmit digital information, mean while it takes into account demands of various departments in forming their own network, forming a dedicated virtual network. It is especially suitable for use in “Control Center to Multipoint’s”, “spread multipoint”, and in a place where wiring is difficult while actual time digital transmission is needed.
Working Frequency: EGSM900/GSM1800 dual band
Maximum Transmit Power: EGSM900/GT800 Class4(2W)
Receiver Sensitivity: Surpass -102dBm
Operating Temprature: -30°C ~+75°C Industrial Class
Power Voltage: DC 3.3V~4.8V
Operating Current: <3.8mA(Idle Mode) <2A(Peak)
Protocol: Compatible with GSM/GPRS Phase2/2+
AT Commands: Standard GSM AT Commands
V.25 AT Commands
Huawei Extended AT Commands( see AT Commands Manual)
SMS Mode: TEXT and PDU(default)
GPRS Data Services: GPRS CLASS 10
Encoding: CS 1,CS 2,CS 3,CS 4
Maximum speed up to 85.6Kbit/s
Embedded TCP/IP Protocol: Supports multi-link(central/slave center), provide ACK respond, capacity cache.