4G Serial Server

4G Serial Server

4G Serial Server is a 4G LTE Wireless Router, 3G, WiFi, which provides a solution for user's device to access 4G network.

Overview of Characteristic

  • MIPS MCU with 8MB Flash and 64M SDRAM
  • Use Linux Operation System
  • Support TCP/IP/Telnet/Modbus TCP Protocol
  • Support Serial To 10/100M Ethernet Conversion, Serial Speed Upto 921600 bps
  • Support 10/100M Ethernet Auto-Negotiation
  • Support Easy Configuration Through a Web Interface
  • Support Security Protocol Such As TLS/AES/DES3
  • Support  Web OTA Wirelss Upgrade  
  • Single 5~36V Power Supply
  • Size: 178 x 95 x 25 mm (L x W x H) 
  • FCC/CE/RoHS Certificated


Sizing Table

Name HF2421  >>
Image HF2421
SDRAM 16MB
Rate 10/100M
Standard 802.11 b/g/n
Network Mode AP
Transmit Power 802.11b: +20dBm(Max.) 802.11g: +18dBm(Max.) 802.11n: +15dBm(Max.)
Receive Sensitivity 802.11b: -89dBm 802.11g: -81dBm 802.11n: -71dBm
Processor MIPS
Basic Frequency 320MHz
Operating System eCos
Resource-Flash 8MB
Interface-Ethernet
Interface Standard 2 RJ45
Protection 8KV Isolation
Security Protocol SSL v3 AES 128Bit DES3
Internet Type 4G/3G/GSM/GPRS
Data Rate LTE FDD:50Mbps(UL), 150Mbps(DL) TDD:35Mbps(UL), 130Mbps(DL) WCDMA 5.76Mbps(UL), 42Mbps(DL) TD-SCDMA 2.2Mbps(UL), 4.2Mbps(DL) CMDA 1.8Mbps(UL),3.1Mbps(DL) GSM/GPRS/EDGE 9.6Mbps(UL),14.4Mbps(DL)
Frequency 2.412GHz-2.484GHz
Multi-Slot Class GPRS Class 12
Terminal Device Class Class B
Coding Schemes CS1 ~ CS4,MCS1-9
Max Transmit Power Class 4(33dBm±2dB) for GSM900 Class 1(30dBm±2dB) for DCS1800 Class E2(27dBm±3dB) for GSM900 8-PSK Class E2(26dBm±3dB) for DCS1800 8-PSK Class 3(24dBm+3/-1dB) for CDMA BC0 Class 3(24dBm+1/-3dB) for WCDMA Class 2(24dBm+1/-3dB) for TD-SCDMA Class 3(23dBm±2dB) for LTE FDD Class 3(23dBm±2dB) for LTE FDD
Application Cli Command
Network Protocol TCP/UDP
Max Link 5
SIM Card 1.8V/3V
Antenna Interface SMA(female, 50Ω)
Port Interface 2 RS232/RS422/RS485 RS232: DB9 RS485/RS422: 5.08mm connector
Data Bits 7,8
Stop Bit 1,2
Charity Bit None,Even,Odd
Baud Rate 300 bps~230400 bps
Flow Control RTS/CTS、DSR/DTR
Buffer 1K
Size 178mm x 95mm x 26mm
Work Temp. -40 ~ 85°C
Storage Temp. -45 ~ 105°C
Input Voltage DC 5~36V
Work Current ~300mA
Power <2.7w
Guarantee 1 years
Accessories 5V/1A Adapter, Male to Female Serial Cable GPRS Antenna