Lantronix CoBoxFL Device Server


Lantronix Product

CoBox-FL External Device Server

  • Flexible, well-developed TCP/IP protocol support
  • RJ45 (10Base-T) and ST Multi-mode Fiber (10ase-FL) Ethernet interfaces
  • RS-232 and RS-485 serial connections via DB-9 and DB-25 serial ports
  • Serial speeds up to 115Kbps supported
  • Configurable via internal web server, serial port, and Telnet login
  • 128-bit encryption for the maximum level of security
  • Flash ROM for easy software upgrades

The CoBox-FL is the first device server to support fiber optic cabling. The CoBox-FL enables devices to connect to an Ethernet network over fiber optic medium. It provides exceptional functionality for users with IP applications requiring two serial ports. An extensive firmware feature set and a variety of configurable hardware options make the CoBox-FL one of the most flexible network-enabling devices available today. The CoBox-FL also has support for 10Base-T connection, making it a fit for most any networking environment.

The CoBox-FL is designed to extend networks over fiber optic cabling to machinery rooms, waste water treatment plants, refineries, mines, and other harsh environments.

Part Number Description
CoBox-FL-11External 2-port device server, DB25 (RS-232/RS-485) and DB9 (RS-232) serial ports, RJ45 and ST type multimode fiber network ports, Com Port Redirector, Universal Power Supply

Features & Specifications

Supported ProtocolsARP, UDP, TCP, Telnet, ICMP, SNMP, DHCP, TFTP, and HTTP
Device SupportSupports any RS-232/RS-422/RS-485 serial device requiring Ethernet access
Network Interface
EthernetST Multi-mode Fiber interface (10Base-FL) RJ45 (10Base-T)
Serial Interface
  • DB25 RS-232/RS-485 serial port DCE configuration
  • DB9 serial port DTE configuration
Data RatesSerial speeds up to 115 Kbps
Modem ControlRTS, CTS, DSR, DCD, DTR
Serial Line Formats
Characters7 or 8 data bits
Stop bits1 or 2
Parityodd, even, none
Flow ControlSoftware XON/XOFF
Hardware CTS/RTS
  • Internal web server
  • SNMP (read only)
  • Serial login
  • Telnet login
System Software Flash ROM standard; downloadable from a TCP/IP host (TFTP download) or over serial port
Diagnostic LEDsTransmit data (yellow)
Receive data (yellow)
Good link (green)
Collisions (red)
Channel status (green and yellow)
Fault indicator (red)
CompatibilityEthernet version 2.0/IEEE 802.3
Power Requirements12-30V DC or AC input
(external adapter included)
Power consumption: 3 Watts
Operating Temperature5 to 50C (41 to 122F)
Storage Temperature-40 to 66C (-40 to 151F)
Physical Dimensions
18.0 x 15.5 x 4.0 cm (7.0 x 6.1 x 1.57 in)
Weight1.1 lbs (.5kg)
Shipping Dimensions
7.0 x 33.66 x 17.15 cm (2.75 x 13.25 x 6.75 in)
Weight2.9 lbs (1.315kg)
Agency Approvals
CE, FCC B(Ethernet), C/UL