Cisco NIM-2FXSP=

Overview

The Cisco NIM-2FXSP= is a network interface module designed to expand Cisco Integrated Services Routers by adding two foreign exchange station (FXS) or direct inward dial (DID) ports. This module enables the connection of standard telephones, fax machines, paging amplifiers, or modems directly to the router, integrating analog voice devices into an IP network without requiring a separate gateway. Its single-slot plug-in design fits neatly inside the router chassis, saving rack space and simplifying cabling for branch offices and small contact centers transitioning to IP communications.

Key features

• Adds two FXS or DID ports to Cisco ISR 4000 Series routers, expanding analog voice connectivity options.
• Installs internally within the router, eliminating the need for external gateways and reducing hardware complexity.
• Supports G.711 and G.729a voice codecs, allowing compatibility with mixed voice environments and efficient bandwidth use.
• Integrated echo cancellation enhances call clarity by reducing audio feedback during conversations.
• Remote monitoring and configuration through SNMP enable administrators to manage the module’s status and settings conveniently.
• Complies with electromagnetic compatibility standards CISPR 22 and EN 55022:2010, ensuring reliable operation in office, campus, and industrial environments.
• Compatible with multiple Cisco ISR models including 4451-X, 4221, 4321, 4331, 4351, and 4431, providing a flexible upgrade path.

Key specs

• Ports: 2 FXS/DID analog voice ports
• Supported voice codecs: G.711, G.729a
• Compatibility: Cisco ISR 4000 Series routers (4451-X, 4221, 4321, 4331, 4351, 4431)
• Compliance: CISPR 22, EN 55022:2010 electromagnetic compatibility standards
• Management: SNMP for remote monitoring and configuration
• Form factor: Single slot plug-in module for router chassis

Connectivity and compatibility

This module integrates seamlessly with Cisco ISR 4000 Series routers, providing analog voice connectivity without additional external devices. It supports standard telephony equipment such as telephones, fax machines, and modems, making it suitable for environments that require legacy device integration alongside IP communications. The support for common voice codecs ensures compatibility with various network configurations and voice quality requirements.

Ideal uses and environments

The NIM-2FXSP= is well suited for branch offices, small contact centers, and enterprise environments that need to maintain analog voice services while migrating to IP-based telephony. Its compliance with electromagnetic standards makes it reliable for deployment in office buildings, campuses, and industrial sites. This module is a practical choice for organizations seeking to consolidate hardware, reduce rack space, and simplify voice network management.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

Learn more

Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

Learn more