Cisco NIM-24A 4 Channel Async Serial interface Expansion Module for ISR4000

Cisco NIM-24A Asynchronous Serial NIM Expansion Module

Cisco NIM-24A 4 Channel Async Serial interface Expansion Module for ISR4000

Cisco NIM-24A Serial interface Expansion Module for ISR4000

Cisco NIM-24A 24-Port Async NIM Module, 1 Year Warranty

Cisco NIM-8MFT-T1/E1 8 Port Multiflex Trunk Voice - TESTED!!

Cisco NIM-24A 4 Channel Async Serial interface Expansion Module for ISR4000