The Cisco 12000 series gigabit switch router (GSR) is the premier routing product family from Cisco designed and developed for the core of service provider and enterprise IP backbones. The Cisco 12000 GSR family includes three models: the Cisco 12008, 12012 and 12016. The Cisco 12008 has eight slots that can be used to support up to 84 DS3, 28 OC-3c/STM-1c, and 28 OC-12c/STM-4c or 7 OC-48c/STM-16c interfaces. The Cisco 12012 has 12 slots that can be used to support up to 132 DS3, 44 OC-3c/STM-1c, 44 OC-12c/STM-4c, or 11 OC-48c/STM-16c interfaces. The Cisco 12016 has 16 slots that can be used to support up to 180 DS3, 60 OC-3c/STM-1c, and 60 OC-12c/STM-4c or 15 OC-48c/STM16c interfaces, with support for 15 OC-192c/STM-64c interfaces in the future. The Cisco 12000 series GSR products are architected to meet the bandwidth, performance, services, and reliability requirements of today's IP core backbones.
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