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參數(shù)資料
| 型號： | T8208 |
| 廠商： | Lineage Power |
| 英文描述： | Asychronous Transfer Mode (ATM) Interconnect(異步傳輸模式互連器件) |
| 中文描述： | 異步轉(zhuǎn)移模式（ATM）的互連（異步傳輸模式互連器件） |
| 文件頁數(shù)： | 2/4頁 |
| 文件大?。?/td> | 125K |
| 代理商： | T8208 |
2
Lucent Technologies Inc.
CelXpres T8206
Asynchronous Transfer Mode (ATM) Interconnect
Product Brief
April 2000
3
Description
(continued)
The CelXpresT8206 device integrates all of the required functionality to transport ATM cells across a backplane
architecture with high-speed cell traffic exceeding 1.5 Gbits/s to a maximum of 32 destinations. The management
of multiple service classes and monitoring of performance on ATM and PHY interfaces is incorporated in the
device’s functionality. Traffic delivery to multi-PHYs (MPHYs) is managed through the UTOPIA interface.
The T8206 may be configured as an ATM or PHY level device providing cell routing between UTOPIA and a 32-bit
wide cell bus. In addition to the 32 data signals, the bus has the following signals:
I
Read clock
I
Write clock
I
Frame sync
I
Acknowledge
ATM cells arriving at the UTOPIA receive interface may get VPI and VCI translation and routing information from a
look-up table in external SRAM. An external synchronous dynamic random access memory (SDRAM) is used to
extend the buffering for ATM cells destined for the UTOPIA transmit interface. This external SDRAM may be parti-
tioned into four or less independently sized queues per PHY. The four queues may be used to implement quality of
service (QoS) using different priorities for each queue.
The CelXpresT8206 provides a shared UTOPIA mode, which allows two devices on different cell buses to share
the same UTOPIA bus in ATM mode. Using a glueless interface, the two T8206 devices resolve queue priorities
and arbitrate the use of the UTOPIA bus. This shared mode can be used to provide redundancy or increase the
system capacity.
In addition, an external microprocessor may send or receive control or loopback cells through the microprocessor
interface. The 8-bit microprocessor interface may be configured to be Motorolaor Intelcompatible and is used to
configure and monitor the device.
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