Cisco NIM-2FXS/4FXO
Cisco 2-Port FXS/FXS-E/DID and 4-Port FXO Network Interface Module Analog voice network interface card
NIM-2FXS/4FXO, 800-41021-01
For the ISR 4461 4451-X 4431 4351 4331 4321 4221*
Cisco 2-Port FXS/FXS-E/DID and 4-Port FXO Network Interface Module Analog voice network interface card
NIM-2FXS/4FXO, 800-41021-01
For the ISR 4461 4451-X 4431 4351 4331 4321 4221*