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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 built-in 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


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