T640 FPC Components

Each FPC consists of the following components:

• FPC card carrier.
• One or two Packet Forwarding Engines, consisting of Layer 2/Layer 3 Packet Processing ASICs, Switch Interface ASICs, T-series Internet Processor ASICs, and a Memory Mezzanine Board (MMB) which includes the Queuing and Memory Interface ASICs. Each Type 1, Type 2, and Type 4 FPC has one Packet Forwarding Engine, and each Type 3 FPC has two Packet Forwarding Engines.
• Processor Mezzanine Board (PMB), which includes a 300-MHz CPU, system controller, 256 MB of SDRAM, and two Fast Ethernet interfaces.
• Two LEDs, located on the craft interface above the FPC, that display the status of the FPC.
• FPC online/offline button, located on the craft interface above the FPC.