參數(shù)資料
型號(hào)： PM7351
廠商： PMC-Sierra, Inc.
英文描述： OCTAL SERIAL LINK MULTIPLEXER
中文描述： 八路串行連接復(fù)用器
文件頁數(shù)： 15/174頁
文件大?。?/td> 1790K
代理商： PM7351
RELEASED
PM7351 S/UNI-VORTEX
DATA SHEET
PMC-1980582
ISSUE 5
OCTAL SERIAL LINK MULTIPLEXER
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
5
4
APPLICATION EXAMPLES
When designing communication equipment such as access switches,
multiplexers, wireless base stations, and base station controllers the equipment
architect is faced with a common problem: how do I efficiently connect a large
number of lower speed ports to a small number of high speed ports Typically, a
number of line-side ports (analog modems, xDSL modems ATM PHYs, or RF
modems) are terminated on each line card. Numerous line cards are then
slotted into one or more shelves and backplane traces or inter-shelf cables are
used to connect the line cards to a centralized (often 1:1 protected) common
card, hereafter referred to as the core card. The core card normally includes one
or more high speed WAN up-link ports that transport traffic to and from a high
speed broadband network.
A block diagram of a 1:1 redundant system is shown in Fig. 1.
Fig. 1 Typical Target Application
Buffering
Discard
Scheduling
Modem
or PHY
WAN
up-link
S/UNI-
DUPLEX
S/UNI-
VORTEX
Line Card #1
Line Card #N
WAN Card
Policing
OA&M
OA&M
S/UNI-
DUPLEX
Buffering
Discard
Scheduling
WAN
up-link
S/UNI-
VORTEX
WAN Card
Policing
OA&M
OA&M
Modem
or PHY
Modem
or PHY
Modem
or PHY
Modem
or PHY
Modem
or PHY
In this type of equipment the majority (perhaps all) user traffic goes from WAN
port to line port, or from line port to WAN port. Although the individual ports on
the line cards are often relatively low speed interfaces such as T1, E1, or xDSL,
there may be many ports per line card and many line cards per system, resulting
in hundreds or even thousands of lines terminating on a single WAN up-link. In
the upstream direction (from line card to WAN up-link), the equipment must have
capacity to buffer and intelligently manage bursts of upstream traffic
simultaneously from numerous line cards.
相關(guān)PDF資料
PDF描述
PM7351-BI OCTAL SERIAL LINK MULTIPLEXER
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PM7351-BI 制造商:PMC 制造商全稱:PMC 功能描述:OCTAL SERIAL LINK MULTIPLEXER
PM-736 制造商:Eclipse Tools 功能描述:
PM7364 制造商:PMC 制造商全稱:PMC 功能描述:FRAME ENGINE AND DATA LINK MANAGER
PM7364-BI 制造商:PMC-Sierra 功能描述:PROTOCOL CONTROLLER, 256 Pin, BGA
PM7366 制造商:PMC 制造商全稱:PMC 功能描述:FRAME ENGINE AND DATA LINK MANAGER
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