CISCO NIM-4FXS 4-port Network Interface Module FXS for ISR 4000 Series Routers

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

CISCO NIM-4FXS 4-port Network Interface Module FXS for ISR 4000 Series Routers

CISCO NIM-4FXO 4-port Network Interface Module VOICE FXO ISR4000 Series Routers

Cisco ISR 4000 NIM-4FXS 4 Port Network Interface Module -Same Day Shipping

Cisco Model NIM-4FXO 4-Port Analog Voice Module For ISR 4000s