Serial-to-GPRS DTU Model: USR-GPRS232-730 ■ ■ ■ Overview---------------------------------------------------------------------------------------------------------------------------------------------USR-GPRS232-730 is a Ultra-low power GPRS DTU, which allows almost any RS232 / RS485 devices to transmit data through GPRS / GSM network. This serial server can realize two-way data transparent transmission between COM and GPRS / GSM network by using a SIM card. ■ ■ ■ Main Features-------------------------------------------------------------------------------------------------------------------------------------◆ Support virtual serial port, FREE software is available ◆ Use single module, embedded TCP / IP Protocol stack, without external CPU, Higher stability ◆ Support public and APN network access ◆ Support heartbeat, Always Online mode, can keep connection with server ◆ Support KEEP-ALIVE, to maintain connection if there is no heartbeat packet ◆ Support network connection in Max 4 Channel, can send data from serial port to different servers ◆ Transparent transmission, can take place of data transfer radio, don't need to change your original system ◆ Aluminum alloy case, shielding external disturbance effectively ◆ Support configure by Computer set-up software / Serial AT Command / SMS AT Command ■ ■ ■ Dimensions--------------------------------------------------------------------------------------------------------------------

Standard Frequency GPRS Multi-slot Class GPRS Device Class Data Bits Baud Rate GPRS Coding Schemes CS1 ~ CS4 Max Launch Power USR extension AT instruction set Data transmission Port Number Interface Standard Serial Buffer Send: 4K Bytes Receive: 4K Bytes Flow Control Network Protocol Device Interface Network Link Count Antenna Interface Disconnection Buffer Speech Interface Network Buffer Basic Parameter Size Operating Temp. Storage Condition Input Voltage Virtual Serial Software Support Windows 2000 or higher (32 bit / 64 bit) Power Protection Jinan USR IOT Technology Limited Working Current...