Cisco NIM-2FXS/4FXOP
Cisco NIM-2FXS/4FXOP 2-Port FXS/FXS-E/DID and 4-Port FXO Network Interface Module
Cisco NIM-2FXS/4FXOP 2-Port FXS/FXS-E/DID and 4-Port FXO Network Interface Module