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Telephone over Ethernet Extender (10/100BaseT)

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The TC1920 Ethernet Telephone Extender enables telephone service over a LAN via 10/100Base-T Ethernet connections. It has builtin codecs that digitize voice and converts to packets for transmission between local and remote TC1920s with designated IP addresses.

  • Extends telephone link over Ethernet
  • Built-in address book (up to 100 entries) for dialing without IP PBX
  • Group dialing up to 10 groups and up to 20 numbers per group
  • Heartbeat feature for peer-to-peer link monitoring
  • Compatible with G.711 u/A-Law (64K), G.726 (32K), G.726 (16K) and G.729A (8K)
  • Compatible with security TLS and SRTP, SIP and analog POTS lines
  • Works over Wi-Fi link
  • Works with fax (T.38 or pass-through)
  • Web-based configuration
  • 28 LEDs for diagnostics and status monitoring
  • Built-in dry contact relay for external alarm and ringer connection
  • FXS (TC1920-1)
  • Two Ethernet RJ45 ports (10/100M)
  • 12VDC, optional 24VDC, -48VDC, 125VDC or 115/230VAC with power adapter
  • Hardened temperature version (optional)

It provides toll quality sound within voice bandwidths from 300Hz to 3.4KHz. Phone connectors are RJ-11 female and 10/100Base-T connectors are RJ-45 female. A 2-wire FXS (foreign exchange subscriber) is provided on the telephone side.


The TC1920 is intended to provide reliable point-to-point or point-tomultipoint telephone/analog service via Ethernet networks. It is often used as critical phone links in campus environments, such as:

  1. Utility substation networks
  2. Airport service stations
  3. Railside maintenance stations
  4. Highway roadside phones
  5. Military compounds
  6. Parking lot entrances
TC1920 - Telephone Over Ethernet Extender
Click to enlarge


Audio Bandwidth
  1. Bandwidth300Hz to 3.4Khz
  1. Phone ConnectorRJ-11 Female
  2. Ring Voltage55Vrms at 25Hz (Depending on the ringing load)
  3. FXO Impedance600 Ohm
  4. FXS Impedance600 Ohm
  5. Ethernet10/100Base-T
  6. Ethernet ConnectorRJ-45 Female
  7. Rate10/100Mbps
Visual Indicators
  1. HOOK, RING, Hotlink (HT-L), FXS, FXO, Slave (SLVE), Master (MSTR), TX & RX Volume, Compression Rate (CP-R), ALARM, LINK, BP1, BP2, PWR A, PWR B, Vcc, RDY
Alarm / Ring
  1. Dry ContactNormal OPEN
  1. Standard12VDC @500mA
  2. Optional24VDC, -48VDC, 125VDC, or 115/230VAC with power cube
  1. Operating-10°C to 50°C
  2. Hi-Temp(optional)-20°C to 70°C
  3. Storage-40°C to 90°C
  4. Humidity95% non-condensing
Physical (Standalone Unit)
  1. Height(3.15cm) 1.24"
  2. Width(17.68 cm) 6.96"
  3. Depth(22.61 cm) 8.90"
  4. Weight(0.43 kg) 0.95 lbs


For more information

Product version may differ from current manual. For assistance or proper manual version please contact Technical Support.