MT8986 Mitel Semiconductor, MT8986 Datasheet - Page 20

• Manufacturer Part Number: MT8986
• Description: CMOS ST-BUS FAMILY Multiple Rate Digital Switch
• Manufacturer: Mitel Semiconductor

MT8986
Applications
Switch Matrix Architectures
The MT8986 is an ideal device for designs of
medium size switch matrix. For applications where
voice and grouped data channels are transported
within the same frame, the voice samples have to be
time interchanged with a minimum delay while
maintaining the integrity of grouped data. To
guarantee the integrity of grouped data during
switching and to provide a minimum delay for voice
connections, the MT8986 provides the per-channel
selection between variable and constant throughput
2-82
IN
IN
IN
Figure 10 - 256-Channel Switch with Rate Conversion between 2.048 and 4.096 Mb/s
Figure 11 - 256-Channel Switch with Rate Conversion between 2.048 and 8.192 Mb/s
8 Streams
@ 2.048 Mb/s
8 Streams
@ 2.048 Mb/s
8 Streams
@ 2.048 Mb/s
8 Streams
@ 2.048 Mb/s
Figure 9 - 512-Channel Switch with Serial Streams at 2.048 Mb/s
STi0
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•
•
•
•
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STi7
STi0
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•
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•
•
•
STi7
MT8986
MT8986
STo0
STo1
STo0
STo1
STo2
STo3
@ 8.192 Mb/s
@ 4.096 Mb/s
2 Streams
4 Streams
MT8986
MT8986
MT8986
MT8986
#1
#2
#3
#4
delay. This can be selected by the V/C bit of the
Connection Memory High locations.
Different connectivities at different data rates can be
built to accommodate Non-Blocking matrices of up to
512 channels while maintaining the per channel
selection of the device's throughput delay. Some
examples of such Non-Blocking configurations are
given in Figures 9 to 11.
For applications where voice and data samples are
encoded into individual 64 kb/s time-slots on an
8kHz frame basis, the switch matrix can operate with
time interchange procedures where only variable
STi0
STi1
STi0
STi1
STi2
STi3
MT8986
MT8986
STo0
STo7
STo0
STo7
•
•
•
•
•
•
•
•
•
•
•
•
8 Streams
@ 2.048 Mb/s
8 Streams
@ 2.048 Mb/s
8 Streams
@ 2.048 Mb/s
8 Streams
@ 2.048 Mb/s
OUT
OUT
OUT