Network Modules

NIM stands for Network Interface Module, the plug-in module format used in Cisco's ISR 4000 series routers. NIMs add functions the base router lacks, for example analogue voice ports, extra switch ports, serial interfaces or cellular connectivity, without replacing the router.

It gives a router six analogue voice ports. The two FXS ports supply dial tone to analogue devices such as handsets, fax machines or door phones. The four FXO ports connect to analogue lines from a telephone provider or an older PBX. The router needs DSP resources and voice software to use them.

Usually, yes. Modules slide into a slot and are secured with screws. Check whether your platform allows the module to be fitted while running, or power the unit down first. Installation and base configuration are also available as a service if you would rather ServerDove fitted and set it up.

The module provides the hardware ports, but some functions it enables, voice in particular, depend on the router's software and licences. Tell the team what the module is for and they will confirm what else the router needs, such as DSP capacity or a feature licence, before you place the order.

Generally not. Cisco has used different module formats across router generations, so modules do not carry over between them. Send your router model and the part you have in mind, and the team will check the slot format and software support before you order.

Yes. Send the router, switch or firewall model and the function you need, such as extra ports, voice or a WAN interface. The team will source a suitable module and quote, and business customers can request a quotation for bulk orders.