United States$5,000,000+
Inventory Delivered By
A
Asad Ullah
4
FXO module delivered clean PSTN connectivity.
NIM-2FXO
Original Stock
Ready to Ship
Voice Module (2-port FXO)
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Name:
NIM-2FXO
- Description:
- Voice Module (2-port FXO)
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 818249167336
- Condition:
- Warranty:
- 3
- List Price:
$590.00
- Price:
$227.0061.5% off
Quantity:
1
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NIM-2FXO Overview
NIM-2FXO is a robust WAN module engineered for integrating analog voice services into modern network infrastructures. Designed specifically for telecom applications, it incorporates dual FXO ports with RJ-11 connectors to interface with traditional PSTN lines, facilitating clear analog-to-digital voice conversion while maintaining compatibility with top-tier routers and communication gateways.
Optimized for easy installation in modular NIM slots, the NIM-2FXO delivers reliable performance under a wide range of operating temperatures (0 to 70°C), making it an ideal choice for expanding enterprise voice capabilities. Officially supported by Cisco platforms, this module meets industry standards for durability and efficiency in digital voice connectivity and call management.
NIM-2FXO price is $227.00, a 61.5% saving from the Cisco list price of $590.00. NIM-2FXO is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for NIM-2FXO for additional pricing. Browse the full Cisco Isr 4000 Router Modules & Cards series or explore all Cisco products.
NIM-2FXO Specifications
- Power Consumption
- N/A
- Weight
- N/A
- Height
- N/A
- Depth
- N/A
- Width
- N/A
- Interface Ports
- N/A
- Expansion Slots
- NIM
- Form Factor
- Modular
- Data Rate
- N/A
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Compatibility
- Cisco
- Product Type
- Network Module
- Connector Type
- RJ-11
- Max Speed
- N/A
- Input Voltage
- 5V
- Supported Features
- N/A
- Module Type
- WAN
- Supported Protocols
- N/A
- Product Name
- NIM-2FXO
NIM-2FXO Use Case
PSTN Failover for Business Continuity with Cisco NIM-2FXO-Voice Module
In a mid-sized retail branch deploying a Cisco ISR router, the NIM-2FXO-Voice Module provides automatic PSTN failover when the IP WAN link degrades or fails. This ensures uninterrupted inbound/outbound voice connectivity, preserves customer service levels during outages, and drives up to 99.9% voice uptime for critical operations.
Legacy Analog Device Integration in Remote Sites
A manufacturing enterprise uses the 2-port FXO module in its Cisco ISRs to connect remote-site analog fax machines, alarm panels and credit-card terminals directly into its centralized VoIP infrastructure. The solution unifies management and billing, enables real-time call monitoring, and cuts analog trunk provisioning by up to 40%, maximizing ROI on existing hardware.
Local Breakout for Toll Bypass and Cost Optimization
A global services firm deploys NIM-2FXO-Voice Modules at regional branch offices to route local and emergency calls directly to the PSTN rather than backhauling over the corporate WAN. This local-breakout strategy reduces toll charges by up to 25%, lowers voice latency, simplifies regulatory compliance, and delivers measurable OPEX savings across all sites.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| NIM-2FXO |  NIM-4MFT-T1/E1= |  SM-X-4X1G-1X10G |  NIM-2FXSP= |  NIM-2FXS/4FXOP | |
|---|---|---|---|---|---|
| Product Type | Network Module | Network Interface Module | Network Module / Network Card | Network Module / Network Card | Network Module |
| Module Type | WAN | T1/E1 Interface Card | Ethernet | Ethernet | NIM |
| Data Rate | N/A | 1.544 Mbps (T1) / 2.048 Mbps (E1) | 1Gbps / 10Gbps | 10G | 1G |
| Connector Type | RJ-11 | RJ-48 | SFP+ | SFP+ | RJ-11 |
| Supported Protocols | N/A | T1/E1 Framing and Signaling | TCP/IP | TCP/IP, iSCSI | TCP/IP |
| Form Factor | Modular | Modular | PCIe | PCIe Modular | Modular |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | 5V | 3.3V | 3.3V | 3.3V | 3.3V |
| Compatibility | Cisco | Cisco Routers | Cisco / Juniper / Arista / Dell / HP | Cisco, Juniper, Arista, Dell, HP | Cisco |
| Max Speed | N/A | 2.048 Mbps | 10Gbps | 10Gbps | 1Gbps |
| Supported Features | N/A | Plug-and-play installation, Redundant design | Auto-negotiation / Jumbo Frames / QoS | Auto-negotiation, Jumbo Frames, QoS | QoS |
| Power Consumption | N/A | 5W | 8W | N/A | 15W |
| Interface Ports | N/A | T1/E1 | Ethernet / SFP+ | SFP+ | N/A |
| Expansion Slots | NIM | NIM | PCIe | NIM | NIM |
| Product Name | NIM-2FXO | NIM-4MFT-T1/E1= | SM-X-4X1G-1X10G | NIM-2FXSP= | NIM-2FXS/4FXOP |
| Height | N/A | N/A | N/A | N/A | N/A |
| Width | N/A | N/A | N/A | N/A | N/A |
| Depth | N/A | N/A | N/A | N/A | N/A |
| Weight | N/A | N/A | N/A | N/A | N/A |
Reviews & Ratings
B
Brian Kelly
5
Simple installation and stable operation.
H
Hina Zahid
4
Worked well with our voice gateway.
S
Steven Ward
5
Good value Cisco module.
T
Talha Naveed
5
No call drops observed.
A
Asad Ullah
4
FXO module delivered clean PSTN connectivity.
B
Brian Kelly
4
Simple installation and stable operation.
H
Hina Zahid
4
Worked well with our voice gateway.
S
Steven Ward
5
Good value Cisco module.
T
Talha Naveed
5
No call drops observed.
Questions & Answers
What is the Cisco NIM-2FXO voice module?
The Cisco NIM-2FXO is a 2-port Foreign Exchange Office interface module that enables analog PSTN line connectivity on compatible Cisco ISR platforms.
Which Cisco routers support the NIM-2FXO voice module?
The NIM-2FXO is supported on Cisco ISR 1900, 2900, 3900 and 4000 series routers with available NIM slots.
How many simultaneous calls can the NIM-2FXO handle?
The NIM-2FXO supports up to two concurrent PSTN calls—one per FXO port.
What signaling protocols does the NIM-2FXO support?
The NIM-2FXO supports loop-start and ground-start signaling for reliable analog PSTN line interfacing.
Is a special license required to deploy the NIM-2FXO?
No additional license is required; the module is fully enabled on properly licensed Cisco ISR platforms.
What cabling is required to connect the NIM-2FXO to PSTN lines?
Standard RJ-11 analog telephone cables are used to connect each FXO port to a PSTN line.
Can I hot-swap the NIM-2FXO module?
No, the router must be powered down before installing or removing the NIM-2FXO to ensure safety and integrity.
How do I install the NIM-2FXO module?
Power off the router, insert the NIM-2FXO into an available NIM slot, secure it, power on the router, and configure dial-peer settings.
Does the NIM-2FXO support fax and modem passthrough?
Yes, it supports T.38 fax relay and G.711 fallback for reliable fax and modem communication over PSTN lines.
What is the power consumption of the NIM-2FXO module?
The NIM-2FXO consumes less than 1 watt, ensuring minimal impact on the router’s overall power budget.
How do I configure dial peers for the NIM-2FXO?
In Cisco IOS, define voice-port FXO interfaces and create inbound/outbound dial peers matching your PSTN numbering plan.
Does the NIM-2FXO integrate with VoIP services?
Yes, it converts analog PSTN calls to VoIP, enabling seamless PSTN-to-IP call routing on Cisco routers.
What warranty covers the Cisco NIM-2FXO?
The NIM-2FXO is covered by Cisco’s limited lifetime hardware warranty, subject to Cisco’s standard terms and conditions.
Where can I purchase the NIM-2FXO module?
You can purchase the NIM-2FXO through Cisco authorized resellers, partners or Cisco’s certified online storefront.
What is the typical delivery lead time for the NIM-2FXO?
Standard lead time is 3–7 business days, depending on regional stock availability and shipping method.
What operating conditions and compliance standards does the NIM-2FXO meet?
The NIM-2FXO is RoHS-compliant, operational between 0°C and 45°C, and meets industry environmental and safety standards.