Customer Service Unit

In telecommunication, a customer service unit (CSU) is a device that provides an accessing arrangement at a user location to either switched or point-to-point, data-conditioned circuits at a specifically established data signaling rate. Note: A CSU provides local loop equalization, transient protection, isolation, and central office loop-back testing capability. Source: from Federal Standard 1037C

 

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contrast
control communications
controlled area
controlled security operation
control of electromagnetic radiation
control operation
convolutional code
convoy internal communications
cooperation factor
copy
cord circuit
core
corner reflector
cosmic noise
costas loop
coupling
cover
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critical frequency
crosstalk
crypto
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crystal oscillator
curve fitting compaction
customer office terminal
customer premises equipment
custom local area signaling service
cutback technique
cutoff frequency
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subroutine
data access arrangement
data bank
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data element
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data transmission circuit
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db (car)
db(a)