Hardware Overview
The JUNOS software runs on two types of Juniper Networks routers: M- and T-series routers. The routers consist of the following major hardware components:
- Sheet metal of the chassis.
- Power supplies (AC or DC).
- Impeller trays.
- Fan assemblies.
- Routing Engine.
- System Control Board (SCB), System and Switch Board (SSB), Switching and Forwarding Module (SFM), Switch Interface Board (SIB), or Forwarding Engine Board (FEB).
- Flexible PIC Concentrators (FPCs), each populated by up to four Physical Interface Cards (PICs) for various interface types, including SONET/SDH OC-192, OC-48, OC-12, and OC-3, ATM OC-12 and OC-3, DS3 (T3), E3, DS1 (T1), E1, Gigabit Ethernet, Fast Ethernet, and Channelized OC-12. Some PICs do not require an FPC.