CX28331-1X CONEXANT [Conexant Systems, Inc], CX28331-1X Datasheet - Page 33
CX28331-1X
Manufacturer Part Number
CX28331-1X
Description
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
Manufacturer
CONEXANT [Conexant Systems, Inc]
Datasheet
1.CX28331-1X.pdf
(68 pages)
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100985A
2.0 Functional Description
2.1 Overview
CX28333 is a triple E3/DS3/STS-1 Line Interface Unit (LIU). It is the physical
layer interface between the data framer (or other terminal-side equipment) and the
electrical cable used for data transmission.
operate over type 734/728 coaxial cable at the rates of 34.368 Mbps (E3), 44.736
Mbps (DS3), and 51.84 Mbps (STS-1). The transmit side takes an NRZ or
already-encoded dual rail input and encodes it into AMI B3ZS (for DS3/STS-1)
or HDB3 (for E3) analog waveforms to be transmitted over the coaxial cable. The
receiver side takes in the attenuated and distorted analog receive signal and
equalizes, slices, and resynchronizes the signal before decoding it to the NRZ
output or sending out a non-decoded dual rail.
respectively. In all respects, their performance and features are identical to the
CX28333.
each channel:
Transmitter:
Receiver:
The CX28333 LIU consists of three independent data transceivers that can
CX28331 and CX28332 are single- and dual-E3/DS3/STS-1 LIUs,
The architecture of the CX2833i includes the following internal functions for
• AMI B3ZS/HDB3 encoder
• pulse shaper
• line driver
• Alarm Indication Signal (AIS) insertion
• transmit monitor
• receive sensitivity
• Automatic Gain Control (AGC)
• receive equalizer
• Clock Recovery circuit
• Loss Of Signal (LOS) detector
• B3ZS/HDB3 decoder with bipolar violation detector
• data squelching
Conexant
2
2-1
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