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Cisco 2800 Series Cisco 2801 Cisco 2811 Cisco 2821 Cisco 2851
Compact Flash Default: 64 MB
Maximum: 128MB
Default: 64 MB
Maximum: 256 MB
Fixed USB 1.1 ports 1 2
Onboard LAN ports 2–10/100 2–10/100/1000
Onboard AIM (internal) slot 2
Interface card slots 4 slots; 2 slots support
HWIC, WIC, VIC, or VWIC
type modules
1 slot supports WIC, VIC, or
VWIC type modules
1 slot supports VIC or
VWIC type modules
4 slots, each slot can support HWIC, WIC, VIC, or VWIC type modules
Network-module slot No 1 slot, supports NM and
NME type modules
1 slot, supports
NM, NME and
NME-X type
modules
1 slot, supports NM,
NME, NME-X,
NMD and NME-
XD type modules
Extension Voice Module
Slot
0 1
PVDM (DSP) slots on
motherboard
2 3
Integrated hardware-based
encryption
Yes
VPN hardware acceleration
(on motherboard)
DES, 3DES, AES 128, AES 192, and AES 256
Optional integrated in-line
power (PoE)
Yes, requires AC-IP power supply
Console port (up to
115.2 kbps)
1
Auxiliary port (up to
115.2 kbps)
1
Minimum Cisco IOS
Software release
12.3(8)T
Rack mounting Yes, 19-inch Yes, 19- and 23-in. options