RS8953 Conexant Systems, Inc., RS8953 Datasheet - Page 16

• Manufacturer Part Number: RS8953
• Description: High-bit-rate Digital Subscriber Line (hdsl) Channel unit
• Manufacturer: Conexant Systems, Inc.

1.0 HDSL Systems
1.1 HTU Applications
Figure 1-1. HTU Block Diagram
1.1.1 Repeaters
Figure 1-2. Repeater System Block Diagram
1-2
Transceiver
T1/E1
MPU
CH1
T1/E1 signals. T1/E1 transceivers convert T1/E1 interface signals into a Pulse
Code Multiplexed (PCM) channel of clock, serial data, and optional frame sync.
ZipWire transceivers convert 2B1Q line signals to HDSL channels of clock, serial
data, and quat sync. The RS8953B translates between PCM and HDSL by
performing PCM timeslot and HDSL payload routing, data scrambling and
descrambling, overhead insertion and extraction, clock synchronization and clock
synthesis. The Microprocessor Unit (MPU) configures devices for the intended
application, manages overhead protocol, and monitors real-time performance.
Figure 1-2
extend transmission distance. RS8953B provides an internal cross-connect path
between HDSL channels 1 and 2 to support single pair repeaters.
Figure 1-1
PCM Channel
MPU Bus
shows single pair repeaters placed in line between HDSL terminals to
illustrates how an HDSL Terminal Unit (HTU) transports standard
Conexant
Channel Unit
RS8953B
HDSL
PCM
RS8953B
CH3
Channel 2
Channel 3
Channel 1
HDSL
HDSL
HDSL
ZipWire Transceiver
ZipWire Transceiver
ZipWire Transceiver
CH2
RS8953B/RS8953SPB
CH1
CH2
CH3
HDSL Channel Unit
N8953BDSB