參數(shù)資料
型號(hào)： MT90221
廠商： Mitel Networks Corporation
英文描述： Quad IMA/UNI PHY Device(四端口 IMA/UNI 物理層設(shè)備（四端口ATM IMA和UNI處理器）)
中文描述： 四IMA的/單向物理層設(shè)備（IMA的四端口/單向物理層設(shè)備（四端口自動(dòng)柜員機(jī)IMA的和單向處理器））
文件頁(yè)數(shù)： 32/116頁(yè)
文件大?。?/td> 309K
代理商： MT90221
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MT90221
24
generating a TXSYNC pulse on every PCM
frame when defined as output
assigning any TX or RX link to any IMA Group
When the TXCK and TXSYNC signals are outputs,
the source for the TXCLK is software selectable from
any of the four RXCK inputs or any of the four
external REFCKs. The TXSYNC signal is generated
from the TXCK and is independent from (not aligned
with) the RXSYNC or other TXSYNC signals.
4.2
There are 8 major modes of operation for the PCM
interface. The only difference between modes 1 to 4
and modes 5 to 8 is in the direction of the TXCK and
TXSYNC signals. In the PCM modes 5 to 8, the
direction is the opposite of what is defined in modes
1 to 4. The direction of the TXCK and TXSYNC
signals is defined by the bit 4 in the
TX PCM Link
Control Register #2
and the PCM mode is defined
in the
TX PCM Link Control Register #1
Mode 1: Generic PCM interface for T1
applications, TXCK and TXSYNC outputs
Mode 2: ST-BUS interface for T1 applications,
TXCK and TXSYNC inputs
Mode 3: Generic PCM interface for E1
applications, TXCK and TXSYNC outputs
PCM System Interface Modes
Mode 4: ST-BUS interface for E1 applications,
TXCK and TXSYNC inputs
Mode 5: Generic PCM interface for T1
applications, TXCK and TXSYNC inputs
Mode 6: ST-BUS interface for T1 applications,
TXCK and TXSYNC outputs
Mode 7: Generic PCM interface for E1
applications, TXCK and TXSYNC inputs
Mode 8: ST-BUS interface for E1 applications,
TXCK and TXSYNC outputs
T1 with ISDN services operation is available in PCM
Modes 1, 2, 5 and 6. Channel 24 is not used to carry
the ATM cells and is reserved for signaling. In this
case, 23 channels are used to carry the ATM cells
over the links and all the links in the IMA Group must
have the same option selected. The signaling
channel is always channel 24 in the T1 frame and its
position will vary with the PCM frame length.
In PCM Mode 1 and 5, the clock can be either 1.544
or 2.048 MHz. If a 2.048 MHz clock is selected, the
mapping of the 24 channels can be either grouped
(the first 24 consecutive timeslots starting with the
Frame Pulse) or spaced (3 of every 4 timeslots,
starting with the second timeslot of the 32 timeslot
frame).
PCM Major Modes
TX PCM Control Registers 1 & 2
Description
Reg 1 bit 6
Reg 1 bit 5
Reg 2 bit 4
E1/T1
ST-BUS/
Generic
Generic
ST-BUS
Generic
ST-BUS
Generic
ST-BUS
Generic
ST-BUS
TXCK/TXSYNC
(Input/Output)
Output
Input
Output
Input
Input
Output
Input
Output
Mode 1
Mode 2
Mode 3
Mode 4
Mode 5
Mode 6
Mode 7
Mode 8
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
0
0
0
1
1
1
1
T1
T1
E1
E1
T1
T1
E1
E1
Table 6 - PCM Modes
PCM Mode
ST-BUS
GENERIC
Clock Frequency
4.096 MHz
1.544MHz
2.048 MHz
Mapping
Grouped
a
Spaced
b
Fixed
c
Fixed
Grouped
Spaced
Fixed
T1 ISDN
(23 channels)
T1 Clear Channel
(24 channels)
E1 (30 channels)
Yes
Yes
--
Yes
Yes
Yes
--
Yes
Yes
--
Yes
Yes
Yes
--
--
--
Yes
--
--
--
Yes
Table 7 - PCM Clock and Mapping Options
a. "Grouped" corresponds to the use of the first 23 or 24 channels (timeslots) from the 32 timeslots available in a frame.
b. "Spaced" corresponds to the use of 3 channels every 4 channels (timeslots) from the 32 timeslots available in a frame.
c. "Fixed" corresponds to the use of channels 1-15 and 17-31 leaving channels (timeslots) 0 and 16 not used.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MT90221AL 制造商:MITEL 制造商全稱(chēng):Mitel Networks Corporation 功能描述:Quad IMA/UNI PHY Device
MT90222 制造商:ZARLINK 制造商全稱(chēng):Zarlink Semiconductor Inc 功能描述:4/8/16 Port IMA/TC PHY Device
MT90222AG 制造商:Microsemi Corporation 功能描述:ATM IMA 40MBPS 2.5V 384BGA - Trays
MT90222AG2 制造商:Microsemi Corporation 功能描述:ATM IMA 40MBPS 2.5V 384BGA /BAKE/DRYPACK - Trays
MT90223AG 制造商:Microsemi Corporation 功能描述:ATM IMA 80MBPS 2.5V 384BGA - Trays
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