Specifications

LBI-39100
6
AUDIO OUTPUTS
Earphones
Supervisor and Operator Headsets Outputs for telephone-style headset earphones similar to
Plantronics model HS-0309-1 or ACS model XW/AT.
Approx. output impedance = 300 ohms. Unbalanced. Typical
output level = 100 mV rms. (-15 dBm). Nominal output range
= -21 to -9 dBm. Sidetone provided.
Speakers
Select and Unselect(s) Typical Enhanced Audio Enclosure output level to Speaker
Assembly = 436 mV rms (-5 dBm). Maximum speaker audio
output power = 2 or 5 watts; selectable via internal switch at
each Speaker Assembly. Each Speaker Assembly is equipped
with a volume control. Minimum volume level provided;
enable/disable switch provided at each Speaker Assembly.
Maximum number of unselect speakers = 3.
Line 1, 2, 3 & 4 Balanced 2-wire 600-ohm outputs each designed to transmit
voice bandwidth audio to one pair of a 4-wire 600-ohm
twisted-pair transmission system provided by the CEC/IMC.
Transformer isolated. Typical output = -5 dBm. Nominal
output range = -20 to +10 dBm. Ground isolation = 1500 Vdc
and greater than 5M ohms.
Call Director Patch Balanced 2-wire 600-ohm output designed to deliver audio to
a Call Director device similar to Plant Equipment model 3780-
L1-TT-010. Typical output = -5 dBm. Nominal output range =
-11 to +1 dBm.
Select & Unselect Recorders Unbalanced outputs each designed to drive audio inputs of an
external recording device. Approx. output impedance =
350 ohms. Capacitively coupled. Typical output = -5 dBm.
Nominal output range = -8 to -2 dBm.
AUDIO INPUTS AND OUTPUTS
Total Harmonic Distortion Less than 1% from 300 to 3000 Hz
Hum and Noise Less than or equal to -55 dB at 1 kHz
Crosstalk Less than or equal to -55 dB at 1 kHz
Level Adjustment All audio input and output levels adjustable via digital
potentiometers using application program running on PC
RELAY CONTACT OUTPUTS
Standard Form-C (SPDT dry contacts) relay connections isolated from
ground and all other signals. One relay activates on console
PTTs. Two others are activated via reserved keystrokes at the
Dispatch Keyboard. Contact rating = 0.75 amps at 26 Vdc.
Ground isolation = 500 Vrms (60 Hz). Open contact isolation
= 500 Vrms (60 Hz).
Call Director On-Hook Form-A (SPST normally-open dry contacts) relay connections
isolated from ground and all other signals. Activates (closes)
when console disconnects CD from CEC/IMC. Contact
rating = 0.75 amps at 26 Vdc. Ground isolation = 500 Vrms
(60 Hz). Open contact isolation = 500 Vrms (60 Hz).
*
These specifications are intended primarily for the use of the serviceman. See the appropriate Specifications Sheet for complete specifications.