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- Description
- Specifications
The NIM-4FXS is a Cisco 4-port analog voice network interface module with FXS, FXS-E and DID ports. It fits the Cisco 4300 and 4400 Series Integrated Services Routers and maps to the VIC3-4FXS/DID card used on the ISR G2 routers. Each FXS port connects through a straight-through 2-wire cable.
The module carries its own DSP for TDM analog voice and needs no packet voice DSP module on the router motherboard. Echo cancellation reaches an echo tail of 128 ms. Ports can run as FXS or as DID. In DID mode a port takes incoming PSTN calls only and does not carry caller ID.
On FXS ports the module adds configurable long loop, message waiting indicator, cable detection, battery polarity reversal and caller ID. Voice codecs include G.711, G.729a, G.726 and G.723, and the module handles T.38 fax, modem pass-through, DTMF detection and RFC 4733 digit relay. Voice applications need the Unified Communications technology package on the router.
The NIM-4FXS can be inserted without powering off the router and weighs 0.44 lb (200 g). A P version, the NIM-4FXSP, has the same functions and needs IOS XE 16.5 or later. FXS certification covers TIA-968-B (USA), CS-03 (Canada), AS/CA S003 (Australia) and PTC220 (New Zealand).
Routers that take this module include the ISR4331/K9 router and the ISR4431/K9 router. More router modules are in Cisco interface cards.
Related: Cisco 4321 router parts
Related: Cisco 4331 router parts
| Part number | NIM-4FXS |
| Type | 4-port network interface module, FXS, FXS-E and DID |
| Ports | 4 FXS (DID mode available) |
| DSP | onboard, TDM analog voice |
| Echo cancellation | up to 128 ms echo tail |
| Fax and modem | T.38 fax, modem pass-through |
| Hot-swap | insertion without powering off the router |
| Weight | 0.44 lb (200 g) |
| Feature license | Unified Communications technology package for voice |
| Related variant | NIM-4FXSP (needs IOS XE 16.5 or later) |
| Compatible with | Cisco 4300 and 4400 Series Integrated Services Routers |