NIM-4FXSP – 4-Port FXS Voice – P-Version Analog NIM – Cisco ISR
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NIM-4FXSP Description
NIM-4FXSP is a Cisco 4000 Series ISR analog voice Network Interface Module for adding four FXS, FXS-E, or DID-capable voice ports to a supported branch router NIM slot. It is used when a Cisco 4300 or 4400 Series ISR needs station-side analog connectivity for phones, fax machines, or key systems, or DID incoming-call service from the PSTN. Cisco identifies this P-version module as functionally equivalent to the non-P version, requiring Cisco IOS XE 16.5 or later, with onboard DSP for voice services, straight-through 2-wire cabling for FXS port connections, and OIR support in supported Cisco 4000 Series ISR NIM slots when no active calls are present.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
NIM-4FXSP |
|
Product type |
4-port FXS analog voice Network Interface Module |
|
Cisco ordering description |
4-Port Network Interface Module – FXS, FXS-E and DID |
|
Port count |
4 FXS/FXS-E/DID-capable voice ports |
|
P-version note |
New manufacturing component version; no functionality change from the non-P version |
|
Analog interface role |
Station-side FXS service or DID incoming-call service |
|
ISR G2 comparison |
VIC3-4FXS/DID |
|
Supported router context |
Cisco 4000 Series ISR NIM slots; Cisco 4300 and 4400 Series support context |
|
Cisco IOS XE release for this SKU |
XE16.5 and above |
|
Voice package requirement |
Minimum Unified Communications technology package for voice applications |
|
DSP design |
Onboard DSP on the voice NIM; no dedicated motherboard PVDM required for this voice module family |
|
OIR support |
Supported in Cisco 4000 Series ISR NIM slots; managed OIR requires no active calls |
Application Scenarios
Specify NIM-4FXSP when a Cisco 4000 Series ISR needs four FXS-class ports for analog phones, fax devices, key systems, or DID-mode handoff in one NIM position.
Keep NIM-4FXSP in the bill when the hardware line item must use the P-suffix PID and the router software plan can meet Cisco’s IOS XE 16.5-and-above requirement.
Select this module for a four-port FXS or DID refresh when the site does not need the FXO line-side ports included on the NIM-2FXS/4FXOP combo module.
Product Comparison
|
Parameter |
NIM-4FXSP |
NIM-2FXS/4FXOP | ||
|---|---|---|---|---|
|
Cisco ordering description |
4-Port Network Interface Module – FXS, FXS-E and DID |
4-Port Network Interface Module – FXS, FXS-E and DID |
2-Port Network Interface Module – FXS, FXS-E and DID |
2-Port FXS/FXS-E/DID and 4-Port FXO Network Interface Module |
|
Product type |
FXS analog voice Network Interface Module |
FXS analog voice Network Interface Module |
FXS analog voice Network Interface Module |
Combination FXS and FXO analog voice Network Interface Module |
|
P-version status |
P version with no functionality change from non-P version |
Non-P version |
P version with no functionality change from non-P version |
P version with no functionality change from non-P version |
|
Port count |
4 FXS/FXS-E/DID-capable ports |
4 FXS/FXS-E/DID-capable ports |
2 FXS/FXS-E/DID-capable ports |
2 FXS/FXS-E/DID-capable ports and 4 FXO ports |
|
Primary interface role |
Station-side FXS service or DID incoming-call service |
Station-side FXS service or DID incoming-call service |
Station-side FXS service or DID incoming-call service |
Mixed station-side FXS/DID and line-side FXO analog voice |
|
ISR G2 comparison |
VIC3-4FXS/DID |
VIC3-4FXS/DID |
VIC3-2FXS/DID |
VIC2-4FXO and VIC3-2FXS/DID |
|
Cisco IOS XE release for this SKU |
XE16.5 and above |
XE3.13.4, XE3.14.3, XE3.15.1, XE3.16 and above |
XE16.5 and above |
XE16.5 and above |
|
DSP note |
Voice NIM includes onboard DSP |
Voice NIM includes onboard DSP |
Voice NIM includes onboard DSP |
Voice NIM includes onboard DSP |
|
OIR or hot-swap support |
Supported in Cisco 4000 Series ISR NIM slots |
Supported in Cisco 4000 Series ISR NIM slots |
Supported in Cisco 4000 Series ISR NIM slots |
Supported in Cisco 4000 Series ISR NIM slots |
- In a NIM-4FXSP vs NIM-4FXS comparison, both are four-port FXS/FXS-E/DID NIMs, but NIM-4FXSP is the P-version PID and uses the XE16.5-and-above software row.
- The NIM-4FXSP vs NIM-2FXSP difference is FXS density: NIM-4FXSP provides four FXS-class ports, while NIM-2FXSP provides two.
- For a NIM-4FXSP vs NIM-2FXS/4FXOP comparison, the interface mix changes because NIM-2FXS/4FXOP adds four FXO ports and only keeps two FXS-class positions.
- Which model to choose depends on whether the BOM requires the exact P-version four-port FXS PID, the non-P four-port PID, a lower-density P-version FXS card, or a mixed FXS and FXO module.
Selection Guide
1. Match the four-port P-version PID
Choose NIM-4FXSP when the Cisco 4000 Series ISR design needs four FXS/FXS-E/DID-capable ports and procurement requires the P-version product ID.
2. Keep NIM-4FXS separate for non-P bills
Select NIM-4FXS instead only when the bill specifies the non-P four-port FXS module and the software plan follows the non-P release row.
3. Move down only for two FXS ports
Choose NIM-2FXSP when the site needs the P-version FXS family but only two station-side or DID-capable analog ports are required.
4. Separate FXS-only from mixed analog voice
Choose NIM-2FXS/4FXOP only when the same router slot must include FXO trunk ports along with two FXS/FXS-E/DID-capable positions.
Ordering Checklist
|
Check Item |
What to Confirm |
Why It Matters |
|---|---|---|
|
Exact product ID |
NIM-4FXSP |
Separates the P-version four-port FXS NIM from NIM-4FXS, NIM-2FXSP, and mixed FXS/FXO modules |
|
P-version handling |
Cisco states no functionality change from the non-P version |
Keeps the hardware suffix from being mistaken for a feature or capacity upgrade |
|
Software baseline |
XE16.5 and above for NIM-4FXSP |
Avoids running the P-version module on a Cisco IOS XE release where analog ports may not be recognized |
|
Interface role |
FXS station-side service or DID incoming-call service |
Prevents ordering an FXS-only NIM for an FXO trunk requirement |
|
Router platform |
Cisco 4000 Series ISR NIM placement within Cisco 4300 or 4400 Series support context |
Keeps the module inside the Cisco-documented ISR analog voice scope |
|
Voice package and signaling |
Unified Communications package plus FXS or DID signaling plan |
Aligns the module order with Cisco voice application requirements and port configuration |
|
Cabling and OIR timing |
Straight-through 2-wire cabling and no active calls before managed OIR |
Follows Cisco cabling guidance and managed OIR restrictions for voice NIM work |
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | NIM-4FXSP | Product type | FXS analog voice Network Interface Module |
| Cisco ordering description | 4-Port Network Interface Module – FXS, FXS-E and DID | Port count | 4 FXS/FXS-E/DID-capable voice ports |
| P-version note | Created due to a new hardware component in manufacturing | Functional relationship | No functionality change from the non-P version |
| Analog interface role | Station-side FXS service or DID incoming-call service | ISR G2 comparison | VIC3-4FXS/DID |
| Supported router family | Cisco 4000 Series Integrated Services Routers | Documented ISR series context | Cisco 4300 and 4400 Series ISRs |
| Unsupported ISR family | Not supported with Cisco 2900 and 3900 Series ISRs | Cisco IOS XE release for this SKU | XE16.5 and above |
| Voice package requirement | Minimum Unified Communications technology package for voice applications | DSP design | Onboard DSP on the voice NIM family |
| Motherboard PVDM requirement | No dedicated packet voice DSP module required on the router motherboard for this voice NIM family | FXS endpoint connection role | Direct connection to phones, fax machines, and key systems |
| DID connection role | Off-premises DID connection from the central office for incoming PSTN calls | DID caller ID note | DID mode does not support caller ID |
| FXS feature notes | FXS or DID functionality, configurable long loop ports, message waiting indicator, and cable detection | FXS signaling options | did delay-dial, did immediate, did loopStart, groundStart, or loopStart |
| Ring frequency options | 20, 25, 30, or 50 Hz | Call progress tone setting | cptone locale under voice-port configuration |
| Voice-port configuration form | voice-port slot/subunit/subslot | Managed OIR restriction | Managed OIR is not supported with active calls |
| OIR support | FXS, FXO, E/M, and BRI NIMs can be inserted into supported Cisco 4000 Series ISR NIM slots without powering off the router | Cabling note | Straight-through 2-wire cable for NIM FXS and FXO port connections |
| Analog NIM jumper note | No jumpers to set on NIM analog modules | Network management | Remote and local configuration, monitoring, and troubleshooting from Cisco IOS XE Software CLI |
Get More Information
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Customer Reviews
Questions & Answers
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What does NIM-4FXSP provide?
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How is NIM-4FXSP different from NIM-4FXS?
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When is NIM-4FXSP selected?
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Does NIM-4FXSP need DSP planning?
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What line behavior matters with NIM-4FXSP?
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Why does NIM-4FXSP appear absent?
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Can NIM-4FXSP replace FXO trunks?
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What capacity question does NIM-4FXSP answer?
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