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C37.94-over-IP Gateway


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The C37.94-over-IP/Ethernet interface card extends two IEEE C37.94 fiber optic circuits over Ethernet networks and provides extremely low latency.

The JumboSwitch® series is a TDM over IP/Ethernet based solution designed to emulate time-division multiplexing over packet switched networks (PSN). TDM over IP/Ethernet is a TDM pseudowire (PW) technology making it possible to provision E1, T1, E3, T3, STS-1 and serial data services across PSN's such as IP, MPLS or layer 2 Ethernet Networks.

For assistance with this product or to request a user manual please contact Technical Support.


  • Extends IEEE C37.94 interfaces over Ethernet (ideal for Teleprotection Relays)
  • Less Than 5 msec. Latency, One Way
  • Point-to-Point & Point-to-MultiPoint Applications
  • VLAN and QoS Support
  • Manage Via Web, SNMP, Serial Console, Telnet
  • Temperature & Power Consumption Monitoring
  • Extreme Temp (-40°C to +80ºC) Optional
  • Meets or Exceeds IEC 61850-3, IEEE1613 & NEMA TS-2 Standards
  • Member of the JumboSwitch® Product Family


Typical applications include extending C37.94 circuits across IP networks.

For example, the TC3846-2 is used to extend Teleprotection relays with a C37.94 interface over existing Layer 2 / Layer 3 Networks.

TC3846-2 - C37.94 IP Gateway, C3794 ip gateway, teleprotection relays
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Data Rates
  1. C37.94Nx64Kbps
  2. Ethernet10/100 Mbps Full Duplex
  3. Console9.6K
Connection Capacity
  1. C37.942 Channels
  2. Ethernet1 Port
Optical (C37.94)
  1. TransmitterLED/ELED
  2. ReceiverPIN Diode
  3. Wavelength850 MM, 1300/1550 SM
  4. Fiber Optic ConnectorST
  5. Loss Budget* - 850/1300/1550nm
  6. Multimode @ 62.5/125µm15dB
  7. Single Mode @ 9/125µm20dB
  1. StandardsIEEE 802.3, 802.3u, 802.1p&Q
  2. ConnectorRJ45
  3. Console Port2.5mm Audio Jack
Diagnostic Functions
  1. Local and Remote Loopback for C37.94 and Ethernet
  1. Unit StatusPWR (A, B), Alarm Vcc, BP, MGM
  2. C37.94Status
  3. EthernetLink/Act
  1. Standard12VDC
  2. Optional24, -48 VDC 90-260 VAC, 50/60Hz
  3. Power Consumption< 10W
Operating Temperature
  1. Hi-Temp-20°C to 70°C
  2. Extreme Temp-40°C to 80°C
  1. Temperature-40°C to 90°C
  2. Humidity95% non-condensing
Physical (Standalone Unit)
  1. Height(3.89 cm) 1.53"
  2. Width(18.54 cm) 7.30"
  3. Depth(24.87 cm) 9.79"
  4. Weight(0.4 gm) 1.00 lb
*Contact factory for higher requirements


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