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Overview of Cisco 3800 Series Routers
OL-5966-01
Overview of Cisco 3800 Series Routers
Cisco 3800 series integrated services routers are part of a new generation of routers that incorporate
high-performance integrated data, voice, video, and virtual private network (VPN) capability, including
hardware-based VPN encryption acceleration, in a modular design that provides the flexibility to
configure your router according to your needs. These routers provide built-in Gigabit Ethernet LAN
interface ports, and you can add a wide variety of LAN and WAN ports with interchangeable network
modules and interface cards. Cisco 3800 series routers are designed for branch office installations that
need integrated low-density switching, security, voice, IP telephony, video, content networking, and
concurrent applications.
This document describes the features and specifications of Cisco 3800 series routers, and includes the
following sections:
• Router Descriptions, page 1
• Product Identification, page 5
• Built-In Ports, page 6
• Module and Interface Card Capacity, page 7
• Port Numbering, page 9
• Memory, page 11
• Power, page 11
• LED Indicators, page 12
• Ventilation, page 12
• Real-Time Clock and Battery, page 12
• Technical Specifications, page 12
• Regulatory Compliance, page 15
Router Descriptions
There are two routers in the Cisco 3800 series—the Cisco 3825 router and the Cisco 3845 router. The
Cisco 3825 router (shown in Figure 1 to Figure 4) is two rack units (3.5 inches) high. The Cisco 3845
router (shown in Figure 5 to Figure 8) is three rack units (5.25 inches) high.