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2W/4W E&M 600 Ohm and Dry Contact over IP Gateway

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The TC3846-6 links or extends up to 4 channels of 600 ohm 2/4-wire analog and dry contacts across Layer 2/3 Ethernet/IP, CE, or MPLS networks. For cost savings and scalability, units can be ordered with only 1 or 2 channels of analog and dry contacts and later expanded in the field to 2 or 4 channels.

  • 1, 2, 4 channels (expandable) of 2W/4W E&M 600 ohm over IP
  • Uncompressed audio ensures flat audio response allowing crystal clear audio and 100% passing of in-band audio signaling
  • Extremely low latency ensures compatibility with all voting and simulcast systems
  • Compatible with all dispatch consoles
  • FSK, FFSK modem capability
  • Meets or exceeds IEC 61850-3, IEEE 1613 & NEMA TS-2 standards
  • Extreme operating temp (-40°C to +80°C) option
  • Member of JumboSwitch Product Family

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.

"Over the past thirty-five years I have used similar boxes from other vendors for similar applications. But I have never seen one that would produce such a linear, uniform audio transmission from one end to the other - especially across an IP link."
- Martin T. Vinson, N.C.T., A.S.C.E.T.

Learn more about Enhanced Audio with Analog Radio Over IP


Voted radio systems

  • Low latency and uncompressed audio ensures reliable operations and crystal clear audio
  • Compatible with all voted solutions
Analog and Dry Contact to IP Application Using Raytheon SNV-12 Voter and Motorola Radio
Analog and Dry Contact to IP Application Using SNV-12 and Motorola
Analog & Dry Contact over IP with voter/comparator application
Typical application TC3846-6 with voter/comparator

Simulcast systems

  • Low latency and signal distortion allows seamless integration with existing analog simulcast networks
600 ohm Analog over IP in remote paging application
Using TC3846-6 in a remote paging application

Leased line replacement

  • 100% compatible with existing 4W or 2W leased lines, improving reliability, network flexibility and allowing for significant cost reductions
600 ohm Analog over IP in leased line replacement application
Using TC3846-6 in a leased line replacement application

600 ohm analog audio devices

  • Compatible with FSK, FFSK modems
TC3846-6 - Analog and Dry Contact IP Gateway
Click to enlarge


Connection Capacity
  1. 600 ohm (2/4 Wire)1, 2, or 4 Ports
  2. Dry Contact1, 2, or 4 Ports
  3. GigabitEthernet1 Port
  1. Dry Contact Interface
  2. Normal openStandard
  3. Normal closeOptional
  4. Max Load Voltage60V
  5. Continuous load current0.55A
  6. Peak load current1.2A
  7. Detector max input voltage9V
  8. 600 ohm Analog Interface
  9. Impedance600Ω
  10. Max Input3Vp-p
  11. Frequency band300 to 3400Hz
  12. ConnectorRJ11
  13. Ethernet Interface
  14. StandardsIEEE 802.3, 802.3u
  15. ConnectorRJ45
  16. Console Interface
  17. Connector2.5mm Audio Jack
Regulatory Approval
  1. CE, FCC Part 15, CISPR (EN55022) CLASS A, IEC 61850-3, IEEE 1613, NEMA TS-2
Diagnostic Functions
  1. Local and Remote Loopback for Analog and Dry Contact
  1. Unit StatusPWR (A, B), Alarm, BU, PL, Vcc, BP, MGM
  2. AnalogOn, Sync
  3. Dry ContactDetector, Relay
  1. Standard12VDC
  2. Optional24VDC, -48VDC or 125VDC (1U/ 2U/ 4U only), 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 (4-Channel Standalone)
  1. Height(3.15 cm) 1.24"
  2. Width(17.78 cm) 7.0"
  3. Depth(22.86 cm) 9.0"
  4. Weight(0.3 kg) 0.75 lbs


For more information

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