The Cisco 2800 series of Integrated Services router platforms are one of my favorites due to their flexibility in accommodating a host of new and legacy modules. This makes them very highly configurable to suit the needs of any large or small voice and/or data deployment.
The following is a Cisco Systems Video fact sheet about this series of routers.
Cisco 2800 Series Integrated Services Routers
Watch the video above to learn about the different models in the 2800 Series routers to select the right one for your business. (3:58 min)
|2801||2||2 FE||120W||2 HWIC/VWIC/WIC/VIC
1 VWIC/VIC (voice only)
|2811||2||2 FE||160W||4 HWIC||1 NME||1 RU|
|240W||4 HWIC||1 NME or
|360W||4 HWIC||1 NME,
In the comments below let me know what sort of further detail you are looking for in regards to this series of routers and I will try to see if I can update this post with it. Thanks.