Feature:
1. The RS485 to GPRS serial server supports TCP with stable performance, with 850/900/1800/1900MHz cellular frequency band
2. The serial server supports remote firmware upgrade and remote configuration parameters
3. Support SMS AT function and support registration package, heartbeat package
4. Adopt serial AT command, IOT Service serial configuration software and IOT Service network configuration software configuration method
5. The server uses for RDA8955 processor, the main frequency is 256MHz and the operating system is for SRX


Specification:
Item Type: RS485 to GPRS Serial Server
Core Parameters:
Model Name: HF7311
Function Explanation: Serial port to GPRS
Processor: For RDA8955
Main Frequency: 256MHz
Operating System: For SRX
FLASH Resources: 4MB
RAM: 4MB
Network Interface Parameters:
Cellular Standard: GSM/GPRS
Antenna Form: External SMA male type
Cellular Frequency Band: 850/900/1800/1900MHz
Cellular Communication Network Protocol: TCP, UDP, DNS
Cellular Transmit Power: GSM850/GSM900: Class 4 (2W)
DCS1800/PCS1900: Class 1 (1W)
GPRS Rate: Downlink 107Kbps, uplink 85.6Kbps
Maximum Number of Connections: 3socket
SIM Card Interface: 1.8V/3V (external)
Serial Port Interface Parameters:
Number of Serial Ports: 1
Interface Standard: RS485
Baud Rate: 1200-460800bps
Product Features:
Configuration Method: Serial AT command, IOT Service serial configuration software, IOT Service network configuration software
WEB Page: Not supported
IP Acquisition Method: DHCP
Virtual Data Channel: Support
Firmware Upgrade: Serial port or OTA upgrade
Registration Package Function: Support
Heartbeat Package Function: Support
Custom Script Function: Not supported
Packet Filtering: Not supported
Serial Port Aut