The Cisco NIM-2FXS/4FXOP is a network interface module designed for Cisco ISR routers, offering two FXS and four FXO ports to enable reliable analog voice and fax connectivity—ideal for businesses integrating legacy telephony with modern IP networks.

The Cisco NIM-2FXS is a compact network interface module designed for Cisco ISR routers, offering two FXS ports for connecting analog devices like phones or fax machines—ideal for enhancing voice capabilities in VoIP deployments, even in used hardware configurations.

The Cisco NIM-2CE1T1-PRI is a dual-port network interface module designed for Cisco ISR 4000 Series routers, offering flexible T1/E1 and PRI connectivity ideal for voice, data, and integrated services in enterprise or branch network environments.