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    TC3848-3 and -4
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TC3848-3 and -4

2 Ch. or 4 Ch. FXS or FXO over Ethernet

This Modem Over IP is compatible with CCITT and Bell data modem standards. It is easy to configure and offers extremely low latency.


  • FXS (TC3848-3) or FXO (TC3848-4)
  • Extends 2 or 4 Ch. 2-Wire Telephone/Dial-up Links
  • 64 Kbps DS0 Channel (No Compression)
  • Extremely Low Latency
  • VLAN & QoS Support
  • Temperature & Power Consumption Monitoring
  • Extreme Temp (-40°C to +80ºC)Optional
  • Meets or Exceeds I EC 61850-3, IEEE 1613 & NEMA TS-2 Standards
  • Member of JumboSwitch® Product Family


The TC3848-3/4 MoIP Gateway is used to link analog telephones or legacy dial-up devices including data modems, fax machines, meters, ATM machines and Credit Card machines over Ethernet/IP or MPLS networks.

It can also be a critical connectivity product for completing migration from a legacy network to a fully integrated voice and data over Ethernet/IP network.

Typical applications include:

  • Connecting a TC3848-3 FXS interface to a 2-wire analog phone station and a TC3848-4 FXO interface to PSTN for outside telephone service
    Phone Link Extender
  • Connecting a TC3848-3 FXS interface to a dial-up meter in the field and a TC3848-4 to a PBX to enable a PC with a built-in dial-up modem to collect information and communicate with a central office.
    Remote Meters on Dial-Up Applications
  • Connecting ATM or Credit Card Machines to a central processing center.
    ATM and Credit Card Machines on Dial-Up
  • Extend Analog Phones or Legacy Dial-up Devices over Ethernet / IP Networks
TC3848-3 and -4 - Modem Over IP
Click to enlarge


  1. FXS/FXO Interface
  2. Impedance600Ω
  3. Frequency Band300Hz to 3400Hz
  4. ConnectorRJ11
  5. Ethernet Interface
  6. StandardsIEEE 802.3, 802.3u, 802.1p&Q
  7. ConnectorRJ45
  8. Console Interface
  9. Connector2.5mm Audio Jack
SLIC Characteristics
  1. Maximum Ringer Load (REN)3
  2. Ringer Voltage50Vrms
  3. Distance4,000 feet (1.2192 km)
  1. Web, SNMP, Serial Console, and Telnet
Regulatory Approval
  1. CE, FCC Part 15, CISPR (EN55022) CLASS A, IEC 61850-3, IEEE 1613, NEMA TS-2
  1. Unit Status PWR (A, B), Alarm, BU, PL, Vcc, BP, MGM
  2. ChannelRing, Hook
  3. EthernetLink, Duplex
  1. Standard12VDC
  2. Optional24VDC, -48VDC or 125VDC (1U/ 2U/ 4U only), 90-260 VAC, 50/60Hz
  3. Power Consumption< 10W
Operating Temperature
  1. Standard 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 (rack mount card)
  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
Ordering Information
  1. TC3848-3-22 Ch. FXS
  2. TC3848-3-44 Ch. FXS
  3. TC3848-4-22 Ch. FXO
  4. TC3848-4-44 Ch. FXO
*Contact factory for higher requirements


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