Cisco Cisco Packet Data Gateway (PDG) 安装指南
ASR 5000 Hardware Platform Overview
▀ Chassis Configurations
▄ ASR 5000 Installation Guide
20
Item
Description
5
Lower fan tray cover/EMI shield: Secures the lower fan tray assembly in place and serves as an EMI shield. The
cover also provides an air baffle allowing air to enter into the chassis.
cover also provides an air baffle allowing air to enter into the chassis.
6
Lower bezel: Covers the lower fan tray bay.
7
Lower fan tray assembly: Draws ambient air through the chassis’ front and sides for cooling and ventilation. It is
equipped with a particulate air filter to prevent dust and debris from entering the system.
equipped with a particulate air filter to prevent dust and debris from entering the system.
8
Power Filter Units (PFUs): Each of the system’s two PFUs provides -48 VDC power to the chassis and its associated
cards. Each load-sharing PFU operates independently of the other to ensure maximum power feed redundancy.
cards. Each load-sharing PFU operates independently of the other to ensure maximum power feed redundancy.