TC Communications
Fiber Optics, Modems, Multiplexers,
Media Converters,
Video, SNMP, SONET, LAN, Ethernet, Scada, ITS, Security, Teleconferencing
,Token Ring, ATM.
Model TC8000
Analog/Intercom Audio Multiplexer
24-Channel
Features
- Up to 24 Analog/Intercom Channels
- Voice Bandwidths from 300Hz to 3.4Khz
- Low Noise PCM Digitized Voice
- Push-Button Buzzer for Signaling
- Single Mode & Multimode
- Built-In Power Redundancy
- Optional Optical Redundancy
- Field Interchangeable Interface Modules
- LEDs for "Alarm," "Power A," "Power
B," "Vcc," "Buzzer," & "Push-Button"
- Rack Mount or Standalone
Description
The TC8000 multiplexes up to 24 channels of Analog or
Intercom Signals over single mode or multimode fiber optic cable. It supports voice
bandwidths from 300 Hz to 3.4 KHz. The analog interface is for FSK (frequency shift key)
applications. It has a 600 ohm isolation audio transformer and supports voltages from 0 to
3 Vpp. The intercom interface is for 4-wire voice communication. It connects to a handset
with mouth-and-ear piece.
The TC8000 digitizes the audio signals and converts them to
PCM (pulse code modulation). Since the analog and voice signals are digitized, the voice
quality does not degrade over extended distances. Distances to 30 km are typical via
1300nm single mode fiber, to 4 km over 850nm multimode fiber.
The TC8000 is available standalone or rack mount. Standalone
versions support up to 8 channels, rack mount support up to 24 channels.
Standard interfaces are RS-232, RS-422 and Dry Contact
Closures. Interface modules are interchangeable. Four RJ-11 ports are provided on the rear
side to connect with handsets or customer's audio devices. Built-in power redundancy is
standard. Optical redundancy is available as an option. Fiber Optical connectors are ST;
FC is optional. Electrical connectors are RJ-11. Power is 9 to 12VDC or 115/230VAC with an
external power cube.
Typical Application (Application Questions)
The TC8000 is frequently used in audio/intercom environments
where it is necessary to transmit multiple intercom quality channels or FSK modem channels
from one location to another via fiber optic cable. It is also used in harsh environments
where ground loops, EMI/RFI interference and lighting conditions may occur.
Electronics