Telex CM-300L Console Mount User Station w/ an A5F Headset Connector

BH #TECM300LA5F • MFR #F.01U.118.504
Telex
Telex CM-300L Console Mount User Station w/ an A5F Headset Connector
Key Features
  • Two Channel Intercom User Station
  • Volume Control
  • Microphone Switch
  • Channel Select Switch
The CM-300L Console Mount User Station w/ an A5F Headset Connector from Telex is a two-channel select console mount user station. The user station is designed to be used in a full duplex, conference line intercom system.

It features a microphone limiter circuit, separate dynamic and carbon microphone inputs and silent channel-select switching. In normal system operation, one or more users talk and the others listen. A microphone switch on each station allows the talker's microphone to be enabled and allows the listeners to keep their microphones disabled.

The unit is housed in a solid metal front cabinet and the back is open for console mounting. The CM-300L uses the MCP-3 mounting kit.

Special Order
Expected availability: 7-14 business days
$773.95

Important Notice

  • This item is noncancelable and nonreturnable.
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Telex CM300L A5F Overview

  • 1Description
  • 2Volume Control
  • 3Microphone Switch
  • 4Channel Select Switch
  • 5Call Light Push Button

The CM-300L Console Mount User Station w/ an A5F Headset Connector from Telex is a two-channel select console mount user station. The user station is designed to be used in a full duplex, conference line intercom system.

It features a microphone limiter circuit, separate dynamic and carbon microphone inputs and silent channel-select switching. In normal system operation, one or more users talk and the others listen. A microphone switch on each station allows the talker's microphone to be enabled and allows the listeners to keep their microphones disabled.

The unit is housed in a solid metal front cabinet and the back is open for console mounting. The CM-300L uses the MCP-3 mounting kit.

Volume Control

The volume control on the CM-300L has a wide range to compensate for: user hearing differences, ambient noise variation, variations in headset / handset sensitivity, and variations in voice. The volume control in the CM-300L reduces distortion by driving the headphone amplifier only as much as needed

Microphone Switch

In normal system operation, one or more users talk and the others listen. A microphone switch on each station allows the talker's microphone to be enabled and allows the listeners to keep their microphones disabled. In this condition, speech intelligibility is enhanced since background noise from other microphones is not present. On the Model CM-300L, a toggle switch turns the microphone on

Channel Select Switch

A channel selector switch allows a choice of two (optionally three) channels. When the switch is on the "1" position the station talks and listens on channel 1, on the "2" position, to channel 2

Call Light Push Button

Pushing this button transmits a call signal to all other units on the channel selected by the channel selector switch. A call signal on this channel will cause the call light push button to flash. The flash rate is 2 to 5 times a second. The call signal itself is a 20kHz signal
UPC: 800549425124

Telex CM300L A5F Specs

Input VoltageTW mode: 18-35 V DC
LP option: 15-35 V DC
Battery: 12-35 V DC (reduced performance)
CurrentQuiescent
23 milliamperes ±10%
33 milliamperes ±10%
Operating 25 Ω headphones
37 milliamperes ±10%
45 milliamperes ±10%
Operating 25 Ω headphones + call light
60 milliamperes ±10%
Impedance across line: 10,000 Ω, minimum
Environmental ConditionsTemperature
Operating: 32-140°F (0-60°C)
Storage: -40-185°F (-40-85°C)
Humidity
Operating and storage: 5-95% non-condensing
NoiseOne unit: -75 dBu
Ten units: -67 dBu
Panel Microphone PreampMicrophone preamplifier
Input impedance: 470 Ω/dynamic mic
Source impedance: 200 Ω, nominal
Maximum input level: 150 millivolts
Frequency response: 100Hz-10kHz ±3 dB (-54 dBu input)
Limiter range: 30 dB
Carbon mic excitation current: 10 millliamperes, nominal
SourceCurrent source
Transfer ratio: 3.3 milliamperes/volt=3.3 millisiemens
Output: ±5 milliamperes into 200 Ω = ±1 volt peak, nominal
Headphone AmpVoltage gain: 34 dB
Output voltage: 8 volts peak-to-peak into 25 ½
Output power: ½ watt peak into 25 Ω
Frequency response: 150Hz-8kHz ±3dB
Headphone impedance range: 25-600 Ω (600-2000 with reduced levels)
Note: Do not use headphones with impedance less than 25 Ω.
Sidetone adjustment range: -20dB to full on
Call Light LevelsSignaling frequency: 20,000Hz ±100Hz
Flashing rate: 5Hz ±2Hz
ConnectorsHeadset connector
Dynamic microphone: XLR type 4-pin female
Carbon microphone: ¼" standard phone jack, 3-circuit
Live connection:
Input: XLR type 3-pin female
Loop/external: XLR type 3-pin female
FinishFront panel: light gray enamel paint, Federal standard 595A Color #26492Chassis: gold iridite over aluminum
Dimensions (H x W x D)2.8 x 6.3 x 6.4" (69.9 x 158.75 x 162.6mm)
Weight1.2 lb. (0.6kg)
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