MT8985
Applications
Typical Exchange, PBX or Multiplexer
Data Sheet
Figure 7 shows a typical implementation of line cards being interconnected through a central routing matrix that can
scale up in channel capacity to accommodate different number of ports depending on the application. In a
configuration where the switched services utilize concatenated or grouped time slots to carry voice, data and video
(channels of 128, 256 Kb/s, ISDN H0 and others), the central routing matrix has to guarantee constant throughput
delay to maintain the sequence integrity between input and output channels. Figure 7 shows an example where
the MT8985 device guarantees data integrity when data flows from the T1/E1 to the S/U interface links and vice-
versa. Modern technologies available today such as Frame Relay network using dedicated fractional T1 are one of
the key applications for the MT8985 device.
To other lines
Basic Rate Line Card
Layers
2&3
Entity
ST-BUS
ST-BUS
To other lines
MT8930/31
S/U
MT8910
MT8972
C
P
U
ROUTING
MATRIX
MT8985’s
ST-BUS
T1/E1
Link
MT8940/
MT8941
MH89760/
MH89790
MT8920
µC
Primary Rate Card
Figure 7 - Typical Exchange, PBX or Multiplexer Configuration
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Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
