Product Overview :

Teamlink FABIO-4CX helps in interfacing the attached devices with ITU-T V.21/V.23 to connect to E1 or Optical 1+1 channel. It is most suitable for Indian Railway Signaling Applications like Axle Counter Inter-connection. The equipment's auto-change over facility allows automatic diversion of V.21/V.23 traffic to the available stand-by Copper circuit when the E1 or Optical link fails. Critical events reporting enables immediate resolution of the problem. The unit is available in 18 V DC to 72V DC power supply.

FABIO-4CX is a modular integrated Access TDM multiplexer with 512 x 512 cross connect ability, which integrates multiple dedicated data, voice and LAN channels over multiple main (network) links. It can provide maximum 2 Electrical and 2 optical E1’s and 2/4W E&M, Quad Cable Ports, RS232/V.24, ETH capacity for accessing and transmission with cross-connect capacity is 512×512 64K. It provides full range of voice and digital data services to subscribers located at different locations require to interconnect and establish a voice and data network over E1 link or optical.

FABIO-4CX enables carriers to successfully deploy bundled services and Internet access. The integration of a broad range of services makes FABIO-4CX a cost-effective access device, with reduced deployment and maintenance costs. The equipment conforms to international standards, ensuring compatibility in multi-vendor environments worldwide.

FABIO-4CX is designed to carry Various Original Equipment Manufacturer’s Digital Axle Circuits over optical fiber (STM).

Features :

  • Automatic Changeover to bypass copper circuit if E1 / Optical link fails or FABIO-4CX unit is powered off
  • Event log Facility is provided E1, V.21 and Optical extra
  • The bypass copper circuit is constantly checked for availability as long as the E1 / Optical Link is up
  • Potential Free Alarm Relay Contacts for Local and Remote monitoring or These relay contacts may be connected to a Data Logger for centralised monitoring of these alarms
  • Compact 1U high, 19-inch chassis
  • Max. E1 channels : 2 Electrical and 2 optical E1s
  • Frame structure : Supports optional CRC-4 and PCM 30/31 settings.
  • Timing : Internal Crystal Oscillator clock, Clock received from any link (loopback)
  • Versatile 64Kbps User interface : E&M 2/4-wire module with adjustable voice gain, Quad Cable Ports and V.24/RS-232 low speed Ports and 4Ethernet
  • Optical 1+1 155Mbps Interface
  • Max E&M channels : 6
  • Quad Ports : 6
  • Async / V.24 Ports : 2 over optical
  • Max FE channels : 4 over optical
  • Performance Monitor: Control panel provides ample control and alarm function. When an E1 channel occurs errors,sound alarm will be activated and LOS/LOF warning message
    of each E1 channel will be displayed.
  • Customer service can be allocated by on-line network operator.
  • Flexible network topologies : Point-to-Point , Daisy Chain.
  • Local and Remote Telnet support

Technical Specifications


  • I/O modules : 2 Electrical and 2 optical E1’s and 6 E&M 2/4W, 6 Quad Cable Ports 2/4W, 2 RS232/V.24, 4ETH Ports
  • Chassis(height) : 1U, 19-inch wide
  • Console port : 1 (RJ-45), Serial
  • Telnet port : 10/100Mbps (RJ-45), Ethernet

Quad Cable Ports

  • Number of Ports : 6 2/4W Selectable
  • Connector : RJ45

Voice Interface

  • Channel sampling rate : 8Khz
  • Commanding law : A-Law
  • Voice Interface : 2W , 4 W Signaling, E&M
  • Frequency : 300 to 3400Hz
  • Impedance : 600Ohms

Data Interface

  • Low speed data interface : RS232, V.24
  • Characteristic : ITU-T V.24
  • Data Format : Asynchronous
  • Asynchronous data : Auto baud upto 115.2 Kbps

Ethernet Data Interface

  • Characteristic : IEEE 802.3
  • Speed : 10/100 Mbps High speed
  • Supports Auto MDI / MDIX
  • Auto Negotiation as per 802.3x
  • Supports Half / Full Duplex Flow control

Uplink Interfaces(E1)

  • Supports 512×512 cross connect ability based on 64K with signaling
  • Bit rate : 2048 +/- 50 ppm
  • Code : HDB3
  • Impedance : 120 Ohms Balanced
  • Electrical characteristics : ITU-T G.703
  • Transfer characteristics : ITU-T G.823
  • Jitter performance : ITU-T G.823

Disaster Management Communication (IR)

  • FABIO-4CX series devices are suitable for disaster communication for extending various services to mid-section in Indian Railways

Power Supply

  • AC : 100V ~ 240V AC (220V nom) DC to AC adaptor and DC : -18V ~ -72V (nom : -48V DC)


  • Operating Temperature : -5 to +55°C
  • Operating Humidity : 5% to 99%