Cisco Cisco IOS Software Release 12.4(23)

This section contains the following sections with information that is specific to the 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. They are 
designed for branch office installations that need integrated low-density switching, security, voice, IP 
telephony, video, content networking, and concurrent applications. 

There are two routers in the Cisco 3800 series—the Cisco 3825 router and the Cisco 3845 router. Their 
features include: 

Two built-in 1000BASE-T Gigabit Ethernet ports with RJ-45 connectors for shielded twisted pair. 
One of these ports provides a slot for an optional small-form-factor pluggable (SFP) module. 

Hardware-based VPN encryption acceleration.

Modular design that enables you to add a wide variety of LAN and WAN ports with interchangeable 
network modules and interface cards. 

The Cisco 3825 router provides two slots for network modules. The lower network module slot of this 
router can hold a single-wide or extended single-wide network module. The upper slot of the Cisco 3825 
router can hold a single-wide, extended single-wide, double-wide, or extended double-wide network 
module. 

The Cisco 3845 router provides four slots for network modules. Each slot can hold a single-wide or 
extended single-wide network module. Slots can be combined in pairs to hold a double-wide or extended 
double-wide network module. 

The Cisco 3825 router and the Cisco 3845 router each provide four interface card slots. Each slot can 
hold a single-wide WAN interface card (WIC), voice interface card (VIC), voice/data T1/E1 WAN 
interface card (VWIC), or high-speed WAN interface card (HWIC). Slots can be combined in pairs to 
hold a double-wide HWIC. 

Advanced integration modules (AIMs) and packet voice data modules (PVDMs) install into connectors 
on the router motherboard. AIMs provide hardware-based support for additional features. PVDMs are 
digital signal processor (DSP) SIMMs that provide voice support. The Cisco 3825 router and the 
Cisco 3845 router can each accommodate two AIMs and four PVDMs.

For detailed information about the Cisco 3800 series of routers, see the documents at the following 
location:

For memory recommendations for the Cisco 3800 series routers in Cisco IOS Release 12.4, see the