Carrier-graderouters are extremely powerful routers in carrier networks. They are used by telephone companies and Internet service providers(ISPs) and can process several gigabits per second on multiple channels.
Carrier-grade routers include versions that have multiprocessor systems, which have 32 processor cores. The data throughput is over 20 million data packets per second at a data rate of 16 gigabits per second. Carrier-grade routers have multiple ports for single- mode fiber and for Gigabit Ethernet, slots for Small Outline DIMMs( SODIMM) and many gigabytes of memory.