6 digital modem network module

8 Port Analog Modem Network Module with v.92

8-port ISDN BRI network module (S/T interface)

 Cisco Wireless LAN Controller Module for managing up to 6 lightweight access points

 2-slot IP communications enhanced voice/fax network module

Single-Port 12 Channel E1 Voice/Fax Network Module

Standard single-wide Cisco EtherSwitch service module with 16 10/100-Mbps ports with Power over Ethernet (PoE), and 1 10/100/1000 Gigabit Ethernet port

Cisco Wireless LAN Controller Module for managing up to 6 lightweight access points

Cisco Intrusion Prevention System Network Module Enhanced for Cisco 2811/2821/2851/3800 Series

One 23-port 10/100 Cisco EtherSwitch service module, 1 10/100/1000 port and IP Base

 Cisco 16-Channel Packet Voice/Fax DSP Module

PVDM2 16-channel to 64-channel factory upgrade

Two-port ISDN BRI VIC, S/T interface, Network Termination (NT) or TE

Two-port ISDN BRI VIC, S/T interface, Terminal Equipment (TE)

1-Port RJ-48 Multiflex Trunk-E1 G.703

 2-Port RJ-48 Multiflex Trunk-E1 G.703

 2-Port RJ-48 Multiflex Trunk - E1/T1

 1-Port 2nd Gen Multiflex Trunk Voice/WAN Int. Card - G.703

2-Port 2nd Gen Multiflex Trunk Voice/WAN Int. Card - G.703

One-port Analog Modem Interface card