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The Cisco 819G Integrated Services Router (ISR) is a compact 3G Cisco IOS fixed router that can operate in outdoor, indoor, and mobile environments. The Cisco 819 ISR is a standard form factor with a commercial operating range. The Cisco 819 Integrated Services Routers support the latest 3G speeds (High-Speed Packet Access Plus [HSPA+] and Evolution Data Optimized [EVDO Rev A]), enabling up to 4G speeds. They are backward-compatible with High-Speed Packet Access (HSPA), Universal Mobile Telecommunications Service (UMTS), Enhanced Data Rates for Global Evolution (EDGE), General Packet Radio Service (GPRS), and EVDO Rev 0/1xRTT. It can also be used as a primary WAN data link. The 3G technology is third-generation wide-area cellular technology that is used in voice telephony and broadband wireless data in a mobile environment.
The Cisco 819 ISR is a desktop form factor with built-in wall-mount features and optional rack-mount features. These routers are powered by an external AC power supply adapter.