參數(shù)資料
型號(hào)： MT90812
廠商： Mitel Networks Corporation
英文描述： Integrated Digital Switch (IDX)(集成數(shù)字開關(guān))
中文描述： 綜合數(shù)字交換機(jī)（IDX的）（集成數(shù)字開關(guān)）
文件頁(yè)數(shù)： 80/105頁(yè)
文件大小： 334K
代理商： MT90812
MT90812
Advance Information
76
23.0 Applications
23.1
Local TDM Channel Assignment
Fig. 28 shows the channel assignment for the local TDM streams used to support the stations, trunks and
analog ports for a typical configuration. There are 8 stations supported by MT9171/72 DNIC transceivers, 8
analog ports supported by 8 Codecs and 4 trunks supported by another 4 Codecs.
In this example, the B-channel information is on the STi/o0 streams. The C- and D-channel information is
placed on the STi/o1 streams (Dual Port mode).
Figure 28 - MT90812 Local TDM Channel Assignment for Typical Configuration
The local STi/o0 and STi/o1 channel assignment is summarized in Table 21.
Table 21 - TDM Channel Assignment
23.2
DNIC Channel Assignment
The MT90812 supports direct connection to the DNICs placed in Digital Network (DN), Dual Port mode. The
DNIC transfers four channels of information via the DV and CD ports. They are B1, B2, C and D-channels. The
B1 and B2 channels each have a bandwidth of 64 kbit/s and are used for carrying PCM encoded voice or data.
The C-channel, having a bandwidth of 64kbit/s, provides a means for the system microprocessor to control the
DNIC and for the DNIC to pass status information back to the system microprocessor. The D-Channel can be
transmitted and received on the line with either 8, 16, or up to 64 kbit/s bandwidth. To support this, the
MT90812 provides buffering of 1, 2 or 8 bits per frame to support D-Channel end to end signalling or low speed
data transfer.
Channel
# of channels
Device
STi/o0
STi/o1
0-3
4
Trunk CODEC 1-4
B1
C
4-11
8
DNIC 1-8
B1
D
12-15
4
CODEC 1-4
B1
C
16-19
4
CODEC 5-8
B1
C
20-27
8
DNIC 1-8
B2
C
28-31
4
Unused.
-
-
i+16
i+32
frame n
i
F0i
STi/o1
STi/o0
channel
0-3
B1 Trunk
1-4
4-7
B1 DNIC
1-4
8-11
B1 DNIC
5-8
12-15
Codec
1-4
16-19
Codec
5-8
20-23
B2 DNIC
5-8
24-27
B2 DNIC
5-8
28-31
Unused
C Trunk
1-4
D DNIC
1-4
D DNIC
5-8
C Codec
1-4
Codec
5-8
C DNIC
1-4
C DNIC
5-8
Unused
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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MT90812AP 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Integrated Digital Switch (IDX)
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