Cisco NIM-2FXO-Fourth-Generation Network Interface Module - Voice / fax module - analog ports: 2 - for ISR 4331, 4351 The Cisco network interface modules (NIMs), which have developed from the enhanced high-speed WAN interface card (EHWIC), are housed on the Cisco® 4000 Series Integrated Services Routers (ISRs), improving port density and module capacity. Flexible configurations are possible with the 4000 Series' up to three integrated NIM slots. The downtime needed for new or replacement modules is decreased thanks to the NIMs' capabilities for online insertion and removal (OIR). Product Detail
