data service unit

In telecommunication, the term data service unit (DSU) has the following meanings: 1. A device used for interfacing data terminal equipment (DTE) to the public telephone network. 2. A type of short-haul, synchronous-data line driver, usually installed at a user location, that connects user synchronous equipment over a 4-wire circuit at a preset transmission rate to a servicing central-office. This service can be for a point-to-point or multipoint operation in a digital data network.

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cosmic noise
costas loop
coupling
cover
critical angle
critical frequency
crosstalk
crypto
cryptochannel
crystal oscillator
curve fitting compaction

customer office terminal
customer premises equipment
customer service unit
custom local area signaling service
cutback technique
cutoff frequency
cutoff wavelength
subroutine
data access arrangement
data bank
data compaction

data element
data forwarder
data integrity
data link
data signaling rate
data transmission circuit
date time group
db (car)
db(a)
dbm
dbrn

data circuit terminating equipment
decollimation
decrypt
degradation
degree of isochronous distortion
degree of start stop distortion
dejitterizer
delay
delay encoding
delay line
delta modulation