MT8985AP1 Zarlink Semiconductor, Inc., MT8985AP1 Datasheet - Page 8

• Manufacturer Part Number: MT8985AP1
• Description: 256 x 256 Channels (8 TDM Streams at 2.048 Mbps) Non-blocking Enhance Digital Switch (EDX) with Constant Delay Mode
• Manufacturer: Zarlink Semiconductor, Inc.

MT8985
During the microprocessor initialization routine, the
microprocessor should program the desired active
paths through the matrices, and put
channels into the high impedance state. Care should
be taken that no two connected ST-BUS outputs
drive the bus simultaneously. When this process is
complete,
matrices can bring the ODE signal high to relinquish
high impedance state control to the CMH
Applications
Typical Exchange, PBX or Multiplexer
Figure 7 shows a typical implementation of line cards
being interconnected through a central routing matrix
that
accommodate different number of ports depending
on the application. In a configuration where the
switched services utilize concatenated or grouped
2-52
S/U
can
the
scale
Basic Rate Line Card
MT8930/31
MT8910
MT8972
microprocessor
up
Figure 7 - Typical Exchange, PBX or Multiplexer Configuration
in
channel
controlling
capacity
b
0s.
ST-BUS
all other
To other lines
the
to
To other lines
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.
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.
Low Latency Isochronous Network
In today's local working group environment, there is
an
interconnection of desktop and telephone systems
so that mixed voice, data and video services can be
grouped together in a reliable network allowing the
deployment
multimedia applications require a network with
µC
increasing
MT8940/
MT8941
Primary Rate Card
ROUTING
Layers
MT8985’s
Entity
2 & 3
of
MATRIX
multimedia
demand
ST-BUS
MT8920
MH89760/
MH89790
ST-BUS
for
Figure 7 shows an
services.
solutions
T1/E1
Link
Existing
C
P
U
on