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Telephone, Data & 10/100 Ethernet Multiplexer (1-9 Ch.)

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The TC8520 Ethernet, Phone & Data multiplexer optimizes fiber optic cable usage by multiplexing one 10/100M Ethernet, 4 Telephone and, optionally, 4 channels of serial data over single mode or multimode fiber. A “bi-directional 1-fiber” option doubles existing fiber optic cable usage.

It converts 2-wire FXS to fiber optics on the telephone side with ring down capability and FXO on the PBX side. Serial data interface options are RS-232, RS-422, TTL and Dry Contact. It also supports 2/4-wire analog (600ohm).

  • Multiplexes 10/100 Ethernet, 2-Wire Analog POTS or 2/4-Wire 600 Ohm Analog and Optional RS-232, RS-422, TTL, Dry Contact
  • Network Management (Web, Telnet)
  • One Fiber Bi-Directional Communication Optic Option
  • Multimode or Single Mode(1300/1550nm)
  • Power Redundancy, Optical Redundancy Optional
  • 12VDC, Optional 24VDC, -48VDC, or 115/230VAC
  • Industrial Hardened (optional)
  • Hi-Temp2 Version Exceeds NEMA & Caltrans Traffic Control Specs


Typical applications include extending SDH/SONET backbones and adding Telephone Voice or 2/4-Wire 600 Ohm Analog, Ethernet and Serial service to existing fiber optic links. Service Providers use the TC8520 as an efficient, cost effective method to provide their customers with Telephone Voice, Ethernet and Serial connections. The one fiber bi-directional communication, option can double usage of existing fiber optic cable plants.

TC8520 - Ethernet, Telephone & Data Fiber Optic Multiplexer
Click to enlarge


Data Rates
  1. Telephone300Hz to 3.4 Khz
  2. Ethernet10/100 Mbps,(10 Mbps throughtput)
  3. RS-232Up to 128 Kbps Async, 64 Kbps Sync
  4. RS-422, TTLUp to 19.2Kbps
Channel Capacity
  1. 2/4-Wire 600 Ohm Analog4
  2. Telephone4
  3. Ethernet1
  4. RS-232, RS-422, TTL4
  1. TransmitterELED/LASER*
  2. ReceiverPIN Diode
  3. Wavelength1300nm Multimode, 1300/1550nm Single Mode
  4. Optical ConnectorsST , FC, SC
  5. Loss Budgets *
  6. LASER20dB SM @9/125µm
  1. Interface2-wire Analog POTS, 2/4-Wire 600 Ohm Analog, IEEE 802.3 Ethernet, RS-232, RS-422, TTL
  2. Ethernet ConnectorRJ45F
  3. 2-wire Analog ConnectorRJ11F
  4. RS-232, RS-422, TTLRJ45
  1. Bit Error Rate1 in 1010 or Better
Visual Indicators
  1. System LEDsPWR A, PWR B, Vcc
  2. Channel Status (each port)RXD, RLOS, LOS, RLPB, BPV, Alarm
  3. Optical Signal StatusSyncB, Optic in Use, RXA, RXB, VLIN
Diagnostic Functions
  1. Local and Remote Loopback
  1. Optional12VDC @ 1.2A
  2. Standard24VDC, -48VDC,125VDC, 115/230VAC
  1. Operating-10°C to 50°C
  2. Hi-Temp1 (optional)-20°C to 70°C
  3. Hi-Temp2 (optional)-40°C to 80°C
  4. Storage-40°C to 90°C
  5. Humidity95% non-condensing
Physical (Standalone Unit)
  1. Height(6.70 cm) 2.6"
  2. Width(18.14 cm) 7.1"
  3. Depth(24.8 cm) 9.8"
  4. Weight(1.36 kg) 3.0 lbs
* Contact factory for higher requirements


For more information

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