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R8953SPB

HDSL Channel Unit

Conexant Systems 

1.0 HDSL Systems

1.1 HTU Applications

1.1.3 Switching Systems

RS8953B/RS8953SPB

HDSL Channel Unit

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

BUFFER

Nx64

RS8953B

SLIP

BUFFER

Nx64

RS8953B

CH1

CH2

CH3

CH1

CH2

CH3

NOTE(S): SLIP BUFFER = Optional frame SLIP BUFFER to align receive PCM with local master frame.

1-4

Conexant

N8953BDSB

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