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DS31256 bảng dữ liệu(PDF) 182 Page - Maxim Integrated Products

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Giải thích chi tiết về linh kiện  256-Channel, High-Throughput HDLC Controller
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DS31256 bảng dữ liệu(HTML) 182 Page - Maxim Integrated Products

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DS31256 256-Channel, High-Throughput HDLC Controller
182 of 183
17.3 Single T3 with 512 HDLC Channel Support
Figure 17-6 shows an application where a T3 line is interfaced to two DS31256s. The T3 line is
demultiplexed by the M13 block and passed to the DS21FF42 and DS21FT42 devices. The T1 framers
locate the frame and multiframe boundaries and interface to the DS31256. Aggregating four T1 lines into
a single 8.192MHz data stream is not required since the DS31256 has enough physical ports to support
the application, but aggregation could be done to cut down on the number of electrical connections
between the DS31256 and the T1 framers. The T1 lines can be either clear channel or channelized.
Figure 17-6. T3 Application (512 HDLC Channels)
DS31256
#1
DS21FF42
4 x 4
16-Channel
T1 Framer
DS21FT42
4 x 3
12-Channel
T1 Framer
DS3112
M13
Interface
1
2
16
Port 0
Port 1
Port 2
Port 3
17
18
28
Port 4
Port 5
Port 6
Port 7
Port 8
Port 9
Port 10
Port 11
Port 12
Port 13
Port 14
Port 15
Port 0
Port 1
Port 2
Port 3
Port 4
Port 5
Port 6
Port 7
Port 8
Port 9
Port 10
Port 11
Port 12
Port 13
Port 14
Port 15
DS31256
#2



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