參數(shù)資料
型號(hào)： MH89770N
廠商： Mitel Networks Corporation
元件分類： 通信及網(wǎng)絡(luò)
英文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁(yè)數(shù)： 16/36頁(yè)
文件大?。?/td> 836K
代理商： MH89770N
4-140
MH89770
Preliminary Information
Figure 8 - Off-Line Framer State Diagram
Hunt Mode
False Candidate
False
Candidate
Forced
Reframe
Out of
Sync.
False
Candidate
Verify
Candidate
Candidate
CRC
Check
In sync
Candidate
*
Candidate
Valid Candidate
Maintenance
Resync
Receiver
Valid Candidate
New Frame Position
* Note: Only when in ESF mode and CRC
option is enabled.
Setting CRC/MIMIC bit high will force the framer to
synchronize to the first terminal framing pattern
detected. In standard D3/D4 applications, the user’s
system software should monitor the multiframe
synchronization state indicated by bit 3 in Master
Status Word 1. Failure of the device to achieve
multiframe synchronization within 4.5ms of terminal
frame synchronization, is an indication that the
device has framed up to a terminal framing pattern
mimic and should be forced to reframe.
One of the main features of the framer is that it
performs its function “off line”. That is, the framer
repositions the receive circuit only when it has
detected a valid frame position. When the framer
exits maintenance mode the receive counters remain
where they are until the framer has found a new
frame position. This means that if the user forces a
reframe when the device was really in the right
place, there will not be any disturbance in the circuit
because the framer has no effect on the receiver
until it has found synchronization.
The out of
synchronization criterion can be controlled by bit 0 in
Master Control Word 2. This bit changes the out of
frame conditions for the maintenance state.
相關(guān)PDF資料
PDF描述
MH89770 Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
MH89770S Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
MH89790B Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
MH89790BN Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
MH89790BS Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MH89770S 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:T1/ESF Framer & Interface Preliminary Information
MH89790B 制造商:MITEL 功能描述: 制造商:ZARLNK 功能描述:
MH89790BN 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ST-BUS⑩ FAMILY CEPT PCM 30/CRC-4 Framer & Interface Preliminary Information
MH89790BS 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ST-BUS⑩ FAMILY CEPT PCM 30/CRC-4 Framer & Interface Preliminary Information
MH89791 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CEPT PCM 30 Transmit Equalizer Advance Information
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