United States$5,000,000+
Inventory Delivered By
S
Samuel Reed
5
Combined ports worked reliably for voice integration.
NIM-2FXS/4FXOP=
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2-port FXS/FXS-E/DID and 4-Port FXO Network Interface Module
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Name:
NIM-2FXS/4FXOP=
- Description:
- 2-port FXS/FXS-E/DID and 4-Port FXO Network Interface Module
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 882658947681
- Condition:
- Warranty:
- 3
- List Price:
$1,900.00
- Price:
$1,098.0042.2% off
Quantity:
1
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NIM-2FXS/4FXOP= Overview
NIM-2FXS/4FXOP= is a specialized telephony network interface module engineered to integrate analog voice communications with modern IP-based environments. It delivers two FXS ports for connecting analog handsets or devices and four FXO ports for interfacing with PSTN lines, ensuring reliable call control and voice transmission in unified communications and voice gateway applications.
Designed as a modular NIM card, the NIM-2FXS/4FXOP= supports standard telephony features and protocols, making it ideal for use in service provider gateways and enterprise voice systems. Its compact form factor and built-in FXS/FXO interfaces enable efficient installation and seamless integration with existing telecom infrastructures, facilitating smooth analog-to-IP conversion and enhanced voice network performance.
NIM-2FXS/4FXOP= price is $1,098.00, a 42.2% saving from the Cisco list price of $1,900.00. NIM-2FXS/4FXOP= is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for NIM-2FXS/4FXOP= for additional pricing. Browse the full Cisco Isr 4000 Router Modules & Cards series or explore all Cisco products.
NIM-2FXS/4FXOP= Specifications
- Power Consumption
- N/A
- Weight
- N/A
- Height
- N/A
- Depth
- N/A
- Width
- N/A
- Expansion Slots
- NIM
- Connector Type
- N/A
- Data Rate
- N/A
- Input Voltage
- N/A
- Storage Temperature
- N/A
- Operating Temperature
- N/A
- Max Speed
- N/A
- Supported Protocols
- N/A
- Product Type
- Telephony Network Module
- Module Type
- FXS/FXO Module
- Form Factor
- NIM
- Compatibility
- VoIP Gateways, Telecom Systems
- Supported Features
- FXS port provisioning, FXO line interface, analog voice integration
- Interface Ports
- FXS, FXO
- Product Name
- NIM-2FXS/4FXOP=
NIM-2FXS/4FXOP= Use Case
Hybrid PSTN–VoIP Gateway for Branch Offices with NIM-2FXS/4FXOP Module
In a multi-site enterprise, deploy the NIM-2FXS/4FXOP 2-Port FXS/FXS-E/DID & 4-Port FXO Network Interface Module on Cisco ISR routers to bridge local PSTN trunks and legacy analog handsets with SIP-based UC platforms. Benefit: Enables seamless voice routing, slashes telephony expenses by up to 30%, and ensures high availability via automatic FXO dial-peer failover.
Direct Inward Dialing (DID) Integration for High-Volume Contact Centers
Contact centers leverage the FXS-E/DID ports on the NIM-2FXS/4FXOP Module to map multiple direct-inward-dial numbers to individual agents, while the 4 FXO ports handle outbound PSTN calls. Benefit: Boosts customer satisfaction with local-number calling, optimizes call distribution, and reduces inbound toll charges by 25%.
Automatic PSTN Failover and Remote Site Telemetry with 4-Port FXO Module
In remote industrial or critical-infrastructure deployments, use the 4-Port FXO side of the NIM-2FXS/4FXOP Module as an automated PSTN backup when IP links degrade, while the 2 FXS ports maintain analog telemetry, alarms, and emergency phones. Benefit: Guarantees uninterrupted voice alerts, strengthens business continuity, and minimizes downtime for mission-critical operations.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| NIM-2FXS/4FXOP= |  NIM-4G-LTE-GA= |  NIM-1GE-CU-SFP |  NIM-2FXSP |  SM-X-4X1G-1X10G | |
|---|---|---|---|---|---|
| Product Type | Telephony Network Module | Network Module | Network Module | Network Module / Network Card | Network Module / Network Card |
| Module Type | FXS/FXO Module | 4G LTE | SFP | Ethernet | Ethernet |
| Data Rate | N/A | N/A | 1G | 10Gbps | 1Gbps / 10Gbps |
| Connector Type | N/A | N/A | SFP | SFP+ | SFP+ |
| Supported Protocols | N/A | TCP/IP | TCP/IP | TCP/IP, iSCSI | TCP/IP |
| Form Factor | NIM | Modular | Modular | Modular | PCIe |
| Operating Temperature | N/A | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | N/A | N/A | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | N/A | N/A | 3.3V | 3.3V | 3.3V |
| Compatibility | VoIP Gateways, Telecom Systems | Cisco | Cisco | Cisco, Juniper, Dell, HP | Cisco / Juniper / Arista / Dell / HP |
| Max Speed | N/A | N/A | 1Gbps | 10Gbps | 10Gbps |
| Supported Features | FXS port provisioning, FXO line interface, analog voice integration | N/A | Auto-negotiation, Jumbo Frames | Auto-negotiation, Jumbo Frames, QoS | Auto-negotiation / Jumbo Frames / QoS |
| Power Consumption | N/A | N/A | N/A | 15W | 8W |
| Interface Ports | FXS, FXO | N/A | SFP | Ethernet | Ethernet / SFP+ |
| Expansion Slots | NIM | NIM | NIM | NIM | PCIe |
| Product Name | NIM-2FXS/4FXOP= | NIM-4G-LTE-GA= | NIM-1GE-CU-SFP | NIM-2FXSP Network Interface Module | SM-X-4X1G-1X10G |
| Height | N/A | N/A | N/A | 1.0 inches | N/A |
| Width | N/A | N/A | N/A | 4.2 inches | N/A |
| Depth | N/A | N/A | N/A | 5.5 inches | N/A |
| Weight | N/A | N/A | N/A | 1.2 lbs | N/A |
Reviews & Ratings
H
Hira Javed
5
No echo or noise issues.
A
Andrei Popescu
4
Stable operation.
D
Dawn Mitchell
4
Good value module.
F
Fahad Ali
5
Satisfied overall.
Questions & Answers
What is the Cisco NIM-2FXS/4FXO network interface module?
The Cisco NIM-2FXS/4FXO is a voice interface module that provides two FXS ports (with FXS-E/DID support) and four FXO ports to connect analog endpoints and PSTN trunks on compatible Cisco routers.
How many FXS and FXO ports does the NIM-2FXS/4FXO offer?
The module offers two FXS ports for analog phones or fax machines and four FXO ports for connecting up to four PSTN trunk lines.
Which Cisco routers are compatible with the NIM-2FXS/4FXO?
The NIM-2FXS/4FXO is supported on Cisco ISR 1900, 2900, 3900, and 4000 series routers running Cisco IOS with IP telephony feature sets.
What analog devices can be connected to the FXS ports?
You can connect analog telephones, fax machines, credit card terminals, and modems to the two FXS ports for seamless voice and data communication.
What type of PSTN lines can I connect to the FXO ports?
The four FXO ports support standard loop-start PSTN trunks from your local telephone service provider for inbound and outbound voice calls.
Does the module support Direct Inward Dialing (DID)?
Yes, the FXS-E extensions on this module support DID services to deliver individual DIDs directly to connected analog devices.
How do I install the NIM-2FXS/4FXO in my Cisco router?
Power off the router, seat the module into a spare NIM slot, secure it with the module retention screw, and power the router back on to automatically recognize the interface.
Which voice codecs are supported by the NIM-2FXS/4FXO?
The module supports popular codecs including G.711 μ-law/A-law, G.729a/b, and G.726, ensuring high-quality voice over IP services.
What is the maximum call capacity of the NIM-2FXS/4FXO?
It provides up to six simultaneous analog voice channels (two FXS + four FXO), subject to router DSP resources and license restrictions.
Can I configure PSTN failover to maintain voice continuity?
Yes, the module supports PSTN failover so that if your VoIP service is unavailable, calls automatically route over the FXO trunks to maintain uptime.
How do I configure dial peers for FXS and FXO routing?
Use IOS commands `dial-peer voice <tag> pots` with `port 0/1/<slot>:FXS<port>` or `FXO<port>` and matching inbound/outbound dial-peer settings to define call routing.
Is a separate software license required for the NIM-2FXS/4FXO?
No additional hardware license is required; voice port support is included in the Cisco IOS IP telephony feature set licensed on the router.
What are the power requirements for the NIM-2FXS/4FXO?
The module draws power directly from the host router’s internal power supply and does not require any external power adapter.
Which regulatory certifications does the NIM-2FXS/4FXO have?
The module is certified for global deployment, including FCC, CE, UL, and CSA approvals, and supports multiple ringing cadences and line voltages.
How can I troubleshoot common issues with the voice ports?
Verify cable connections, confirm IOS version compatibility, use `show voice port summary`, and enable `debug voice ccapi inout` for detailed call processing logs.
Where can I purchase the NIM-2FXS/4FXO or obtain support?
You can purchase through authorized Cisco resellers or the Cisco online store and obtain technical support via Cisco TAC or the Cisco Support Community.