• fiercetelecom | Posted: 22 Aug 2017, 09:58Ciena and Cisco are reaping the benefits as service providers shift spending from long haul to metro WDM (wave-division multiplexing) network builds.As a result of double-digit year-over-year North America growth in metro WDM, Cignal Al said in its second-quarter 2017 Optical Hardware Report that that Cisco and Ciena grew market share. The research firm said that Ciena’s North American optical equipment revenue increased by 21% year-over-year. Interestingly, the growth in metro WDM spending is creating greater demand for higher speed coherent ports, which are evolving from 200G to speeds as high as 400G later this year. Outside of North America, growth in China is notable as optical revenue rose 13% year-over-year for the first half ...
    2018 - 10 - 10

Public Address system (PA)

日期: 2014-07-01
浏览次数: 160

Digital Public Address System including:


The Main line Broadcast System, Depot /Parking Lot Broadcast System

The Main line Broadcast System includes Central Broadcast System and Station Broadcast System. The broadcast system is connected to Ethernet transmission network in control centers, stations, depots / parking lots, and realizes the dynamic exchange of all kinds of information through TCP/IP protocol.


Public Address system (PA)


System Device Topological Graph

Public Address System can provide the following functions:


Public Address system (PA)


Central Broadcast Function
Station Broadcast Function
Automatic Inbound Broadcast 
Automatic Broadcast Computer Function

Emergency Broadcast Function
Station Monitoring Function
Automatic Volume Control Function 
Parallel Broadcasting Function
Priority Broadcast Function 


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