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Cisco CRS-1 Backbone Core Router. Carrier Routing System (CRS) is a modular and distributed core router developed by Cisco Systems Inc that enables service providers to deliver data, voice, and video services over a scalable IP Next-Generation Network (NGN) infrastructure.
The switching or reconfiguration functions of a ROADM can be achieved using a variety of switching technologies including microelectromechanical systems (MEMS), liquid crystal, thermo optic and beam-steering switches in planar waveguide circuits, and tunable optical filter technology. MEMS and liquid crystal technologies are the most widely used.
In their first month alone, Cisco was able to land contracts worth more than $200,000. The company produced revolutionary technology such as the first multiport router-specific line cards and sophisticated routing protocols, giving them domination over the market-place. Cisco went public in 1990, the same year that Bosack resigned. [2]
Cisco CRS-1 Backbone Core Router. A core router is a router designed to operate in the Internet backbone, or core, or in core networks of internet service providers. [1] To fulfill this role, a router must be able to support multiple telecommunications interfaces of the highest speed in use in the core Internet and must be able to forward IP packets at full speed on all of them.
Cisco products (1 C, 26 P) D. ... Ethernet cables (12 P) F. Fiber optics (4 C, 115 P) Fiber-optic communications (5 C, 81 P) H. Hardware routers ... Cable router ...
A fiber management system (FMS) manages optical fiber connections from outside of fiber rack to the fiber routers. Fiber-optic cable duct containing many fibers comes from far end sites and terminates on the FMS using splicing technology. FMS has fiber in and fiber out ports. From fiber out port the fiber patch will go to fiber optics based router.
A Foundry Networks router with 10 Gigabit Ethernet optical interfaces (XFP transceiver). The yellow cables are single-mode duplex fiber optic connections. There are two basic types of optical fiber used for 10 Gigabit Ethernet: single-mode (SMF) and multi-mode (MMF). [22]
Cerent's first product was the Cerent 454 (later the Cisco 15454). The Cerent 454 was a second generation SONET ADM (Add-Drop Multiplexor) that also supported TCP/IP data switching. When operating as a pure ADM, the 454 could add and drop circuits from OC-192 down to Digital Signal 1 (DS1) -- later it would support wavelength-division ...
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