1.0 HDSL Systems
RS8953B/RS8953SPB
1.1 HTU Applications
HDSL Channel Unit
1.1.3 Switching Systems
Figure 1-4 illustrates how the RS8953B is incorporated into a digital switch or
multiplexer system that uses multiple HDSL lines to transport Nx64 or standard
T1/E1 applications. The RS8953B’s PCM timeslot router contains 64 table entries
that extends the maximum PCM channel rate to 64x64 or 4.096 Mbps. RS8953B
allows PCM channels at the central office (CO) and remote ends to operate at
different rates. For example, the PCM channel in a digital switch may connect to a
4.096 Mbps shelf bus, while the remote terminal connects to a T1/E1 standard
PCM channel.
Figure 1-4. Switch/Mux System Block Diagram
DS0 Switch Matrix
SLIP
SLIP
BUFFER
BUFFER
Nx64
Nx64
RS8953B
CH2
RS8953B
CH2
CH1
CH3
CH1
CH3
NOTE(S): SLIP BUFFER = Optional frame SLIP BUFFER to align receive PCM with local master frame.
1-4
Conexant
N8953BDSB
CONEXANT [ CONEXANT SYSTEMS, INC ]
