Cisco 4400 Series Integrated Services Routers

2-Port Serial WAN Interface card

4-port Network Interface Module - BRI (NT and TE)

4-port ISDN BRI S/T NIM Module

4-port ISDN BRI S/T NIM Module

4-Port Network Interface Module - Ear and Mouth

4-port Network Interface Module - FXO (Universal)

4-Port Network Interface Module - FXS, FXS-E and DID

4G LTE NIM for North America AT&T and Canada

4G LTE NIM for Sprint

4G LTE NIM for Verizon

Cisco NIM-4T 4-port Serial Wan Interface Card

4-Port Serial WAN Interface card