Modern Gateway Hardware Platforms
This section covers some of the current Cisco voice gateway models used in today’s
enterprise environments.
Cisco 2800 Series Integrated Services Routers
The Cisco 2800 Series Integrated Services Routers, as pictured in Figure 1-10, comprise
four models (listed from top to bottom): Cisco 2801, Cisco 2811, Cisco 2821, and Cisco
2851. The 2800 Series provides increased security, voice, and overall performance,
embedded service options, and dramatically increased slot performance and density, as
compared to older 2600 Series models. It also maintains support for most of the morethan-
90 modules available for the Cisco 1700 Series Modular Access Routers, 2600
Series Multiservice Platforms, and 3700 Series Multiservice Access Routers.
Figure 1-10 Cisco 2800 Series Integrated Services Routers
The 2800 Series can deliver simultaneous, high-quality, wire-speed services up to multiple
T1/E1/xDSL connections. The routers offer embedded encryption acceleration and,
on the motherboard, voice digital-signal-processor (DSP) slots. They also offer intrusion
prevention system (IPS) and firewall functions, optional integrated call processing and
voice-mail support, high-density interfaces for a wide range of wired and wireless connectivity
requirements, and sufficient performance and slot density for future network
expansion requirements and advanced applications. Go to http://www.cisco.com/go/2800
to learn more about the Cisco 2800 Series routers.