參數(shù)資料
型號: MT90500
廠商: Mitel Networks Corporation
英文描述: Multi-Channel ATM AAL1 SAR(多通道 ATM AAL1分段及重組設(shè)備(基于通訊總線的系統(tǒng)與ATM網(wǎng)絡(luò)的接口))
中文描述: 多通道自動柜員機AAL1特區(qū)(多通道自動柜員機AAL1分段及重組設(shè)備(基于通訊總線的系統(tǒng)與空中交通管理網(wǎng)絡(luò)的接口))
文件頁數(shù): 154/159頁
文件大?。?/td> 514K
代理商: MT90500
MT90500
154
7.6
Other Applications
7.6.1
Payload Switching
Figure 71 indicates how the MT90500 can be used as a payload switch. In such an application, TDM data
received in the cell payload of one ATM VC can be transmitted from the MT90500 as the cell payload of a
different ATM VC. Note that this constrains the Receive Circular Buffers to 64 bytes (the same size as the
Transmit Circular Buffer), which limits the CDV tolerance. A major consideration in this application is delay
tolerance of the transported channels, as the reassembly delay and segmentation delay of this payload switch
are added to the end points/ reassembly delay and segmentation delay.
7.6.2
TDM Switching and Loopback
Figure 72 indicates how the MT90500 can be used to switch one or more TDM channels. In such an
application, TDM data input on a specific time slot and stream can be output from the MT90500 on a different
TDM time slot and stream. (When an input TDM channel from a specific trunk is output back to that trunk, this
switching can be termed a “l(fā)oopback”.) Note that for this application the Receive Circular Buffers for the TDM
channels involved must be 64 bytes (the same size as the Transmit Circular Buffer).
To perform loopback or switching of a specific TDM input channel to a specific TDM output channel, the
Transmit Circular Buffer Control Structure is first programmed to have the desired input TDM channel written to
a particular TX Circular Buffer. The External Memory to Internal Memory Control Structure is then programmed
to set up an RX Circular Buffer 64 bytes long, at the same address as the TX Circular Buffer just enabled. At
the same time, the desired output TDM channel is set up to read from this RX Circular Buffer (shared buffer).
No further CPU involvement is required.
Figure 71 - TDM Payload Switching
RX
SAR
TX
SAR
Circular
Buffer
(
64 bytes)
Arriving ATM Cells
Transmitted ATM Cells
N Arriving VCs,
k TDM Channels
M Transmitted VCs,
k TDM Channels
Circular
Buffer
(64 bytes)
Circular
Buffer
(64 bytes)
k Circular Buffers
(Serve as Receive AND Transmit)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MT90500AL 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Multi-Channel ATM AAL1 SAR
MT90500AL-ENG1 制造商:Mitel Networks Corporation 功能描述:
MT90502 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Multi-Channel AAL2 SAR
MT90502_06 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Multi-Channel AAL2 SAR
MT90502AG 制造商:Rochester Electronics LLC 功能描述: 制造商:Zarlink Semiconductor Inc 功能描述: