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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)） |
| 文件頁數(shù)： | 25/105頁 |
| 文件大?。?/td> | 334K |
| 代理商： | MT90812 |
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Advance Information
MT90812
21
6.4
Conference Overflow
A peak clipping indicator identifies the conference causing conference bridge overflow whenever a 14-bit two
complement overflow occurs
1
. Once a conference bridge overflow occurs an interrupt is asserted, the
Conference Overflow bit in the Interrupt Status Register (INTS) is set and the conference ID is placed in the
Conference Overflow Status Register (CONFO). Refer to the CONFO register description on page 59.
Reading the Interrupt Status Register (INTS) will clear the Conference Overflow bit. A conference overflow will
not trigger an interrupt until the conference overflow bit is cleared. The conference overflow interrupt is
maskable using the Interrupt Enable Register (INTE). The conference interrupt mask does not disable updates
of the CONFO register. The Conference ID in this register will not be updated again until it is reset. The register
is reset following a read of the register or resetting the conference block or Mt90812 device.
Note 1 - The overflow limit is the same whether Ulaw or Alaw companding is used. Following gain adjustment
companding will then implement clipping to the Ulaw and Alaw max values of 8031 and 4032 respectively.
6.5
Starting a New Conference
In order to initiate a conference, the Conference Party Control register as well as Connection Memory Low/
High must be programmed. Setting the
ST
bit for the
first
party programmed for a conference will remove any
other parties that may have been previously programmed for that conference. The following steps outline
initialization of a conference.
Conference Block Initialization
1)
Perform MT90812 reset or conference reset. The Conference Party Control registers are reset
and all conference ID numbers are set to null.
2)
Disable the conference overflow interrupt until after a conference is set up. Set CFE bit LOW in
the Interrupt Enable Register (INTE).
3)
Enable the conference block by writing to the conference control register, setting CFEN=1 and
setting the tone duration.
4)
Set up Tone Insertion: program the tone by writing the tone coefficient registers if a different
programmable tone is required. Refer to “Tone Generation” on page 42 Identify the tone by
writing CML location 6F with the DM address of the Tone. Write CMH location 6F with the gain
setting for the insertion tone.
Conference Party Initialization
5)
Write CMH with the Incoming gain, inversion bit and noise suppression for the first party.
6)
Write CML with the Incoming channel DM address for the first party.
7)
Write the Conference Party Control register with a conference ID from 1-5. Set the
ST
bit for the
first
party programmed for a conference. Setting the ST bit will remove any other parties that may
have been previously programmed for that conference. Set the Insertion Tone bit and outgoing
conference gain control required.
8)
Write CML of the Incoming channel with DM address of the conference output location (60-6E
H
).
Write CMH of the location with the required outgoing gain if it has not been previously set. Also
set the OE bit.
9)
Repeat steps 5 to 8 for each additional party in the conference.
10) Enable the conference overflow interrupt if required, by setting CFE, bit 1 in the Interrupt Enable
Register (INTE). Read the CONFO register to ensure it is reset allowing the next overflow to
update the conference ID value.
6.6
Removing a channel from a Conference
Setting the Conference ID number, in Conference Party Control register, to ‘0’ will disconnect the selected
channel from the conference. Once the selected channel is removed from the conference, the Output Enable
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT90812AL | 制造商:Microsemi Corporation 功能描述:SWIT FABRIC 192 X 192 16.384MBPS 5V 64MQFP - Trays 制造商:Zarlink Semiconductor Inc 功能描述:SWIT FABRIC 192 X 192 16.384MBPS 5V 64MQFP - Trays |
| MT90812AL1 | 制造商:Microsemi Corporation 功能描述:SWIT FABRIC 192 X 192 16.384MBPS 5V 64MQFP - Trays 制造商:Microsemi Corporation 功能描述:PB FREE INTEGRATED DIGITAL SWITCH |
| MT90812AP | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Integrated Digital Switch (IDX) |
| MT90812AP1 | 制造商:Zarlink Semiconductor Inc 功能描述:SWIT FABRIC 192 X 192 16.384MBPS 5V 68PLCC /BAKE/DRYPACK - Rail/Tube 制造商:Zarlink Semiconductor Inc 功能描述:INTEGRATED DIGITAL SWCH |
| MT90812APR | 制造商:Microsemi Corporation 功能描述:SWIT FABRIC 192 X 192/64 X 64 1.048GBPS 5V 68PLCC - Tape and Reel |
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