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Что (кто) такое Channel Service Unit - определение
TELECOMMUNICATIONS EQUIPMENT
channel service unit
<communications> (CSU) A type of interface used to connect a
terminal or computer to a digital medium in the same way
that a modem is used for connection to an analogue medium.
A CSU is provided by the communication carrier to customers
who wish to use their own equipment to retime and regenerate
the incoming signals. The customer must supply all of the
transmit logic, receive logic and timing recovery in order to
use the CSU, whereas a digital service unit DSU performs
these functions.
(1995-01-30)
Channel service unit
In telecommunications, a channel service unit (CSU) is a line bridging device for use with T-carrier, which
data channel
PHYSICAL OR LOGICAL CONNECTION USED FOR TRANSMISSION OF INFORMATION
Channel (communications); Communications channel; Input-output channel; Channel model; Data channel; Coherent transmission; Transmission channel; Voice channel
<communications> A channel (on a BRI or PRI line) used to
carry control information, to set up connections on the
associated bearer channels. The name wasn't too bad back
when users were sending voice (not data) over the {bearer
channels}, but in 1997 it's quite a misnomer.
(1997-03-10)
Википедия
Channel service unit
In telecommunications, a channel service unit (CSU) is a line bridging device for use with T-carrier, which
- is used to perform loopback testing;
- may perform bit stuffing;
- may also provide a framing and formatting pattern compatible with the network;
- provides a barrier for electrical interference from either side of the unit; and
- is the last signal regeneration point, on the loop side, coming from the central office, before the regenerated signal reaches a multiplexer or data terminal equipment (DTE).
