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Telephone/Analog over Ethernet Extender (10/100BaseT)

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The TC1920 Ethernet Telephone/Analog Extender enables telephone service over a LAN via 10/100Base-T Ethernet connections. Compatible with POTS Key Systems and PBXs, it has a built-in Codec that digitizes voice and converts to packets for transmission between local and remote TC1920s with designated IP addresses.

It provides Toll Quality sound within voice bandwidths from 300Hz to 3.4KHz. 2-wire FXS (foreign exchange subscriber) is provided on the telephone side and FXO (foreign exchange office) on the PBX side. LAN connections can be made by most types of Full Duplex Ethernet devices, including switches, routers, bridges, transceivers, etc.

  • Extends Telephone/Analog 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), G.729A (8K)
  • Works over WiFi Link
  • Works with Fax (T.38 or Pass-Through)
  • Security TLS & SRTP compatible
  • Web-Based Configuration
  • Analog POTS line Compatible
  • SIP Standard Compatible
  • 28 LEDs for Diagnostics & Status Monitoring
  • Built-in Dry Contact Relay for External Alarm and Ringer Connection
  • FXS (TC1920-1) or FXO (TC1920-2)
  • Two Ethernet RJ45 Ports (10/100M)
  • 12VDC, Optional 24VDC, -48VDC, 125VDC, or 115/230VAC with Power Adapter
  • Hardened Temperature Version (Optional)


The TC1920 is intended to provide reliable point-to-point or point-to multipoint telephone/analog service via Ethernet Networks. It is often used as critical phone links in a campus environment such as:

  1. Utility Substation Networks
  2. Airport service stations
  3. Rail side maintenance stations
  4. Highway roadside phones
  5. Military compound
  6. Parking lot entrance
TC1920 - Telephone Over Ethernet Extender
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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.