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-4FXS 4-Port Network Interface Module FXS FXS-E DID 2900 3900

CISCO NIM-4FXS 4PT NTWK I/F MOD FXS FXS-E AND DIDD

Cisco NIM-4FXS 4-Port ANALOG FXS Expansion Module for ISR4000 Series