RS8953 Conexant Systems, Inc., RS8953 Datasheet - Page 19

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

RS8953B/RS8953SPB
HDSL Channel Unit
1.1.4 Loop Carrier/Pair Gain
Figure 1-5. Voice (Pairgain/Cellular/PCS) System Block Diagram
N8953BDSB
NOTE(S):
SLI = Subscriber Line Interface
SLI
SLI
1
n
Nx64
Bus
Figure 1-5
bank of voice and/or data subscriber line interfaces using an Nx64 bus. The total
number of subscriber lines determines the PCM channel rate and determines how
many HDSL wire pairs are needed to transport the application up to the digital
loop carrier, cellular base station, network distribution element, or to the private
branch exchange. The RS8953B supplies the PCM frame sync reference and acts
as the PCM bus master for the remote channel bank. The RS8953B’s Digital
Phase Locked Loop (DPLL) clock recovery allows PCM channel rates down to
2x64 or 128 kpbs. Unpopulated PCM timeslots or HDSL payload bytes can be
replaced by an 8-bit programmable fixed pattern, or one of four Pseudo-Random
Bit Sequence (PRBS) patterns.
shows a channel bank application where the PCM channel connects a
RS8953B
Conexant
CH2
CH3
CH1
Optional
Loop, Access,
or Distribution
Node
1.1 HTU Applications
1.0 HDSL Systems
1-5