Cisco Network Interface Module 2 FXS/DID Ports Expansion

The Cisco NIM-2FXSP= is a network interface module that expands a Cisco Integrated Services Router with two foreign exchange station and direct inward dial ports. By adding these analog voice interfaces directly to the router, the module lets you connect standard telephones, fax machines, paging amplifiers, or modems and bring them onto your IP network without a separate gateway.

The single slot plug in design fits inside the router chassis, which saves rack space and simplifies cabling. Support for G.711 and G.729a voice codecs works in mixed environments, and onboard echo cancellation helps keep every call clear. Because the module is managed through the router, administrators can monitor status, collect statistics, and adjust settings remotely through SNMP.

Cisco engineered the NIM-2FXSP= to meet electromagnetic compatibility standards such as CISPR 22 and EN 55022:2010, so it can be deployed confidently in offices, campuses, and industrial sites that follow regional compliance requirements. The module is compatible with Cisco 4451-X, 4221, 4321, 4331, 4351, and 4431 routers, making it a straightforward upgrade path for branch offices and small contact centers that need reliable analog voice connectivity while they transition to full IP communications.

Highlights:

• Adds two FXS or DID ports to Cisco ISR 4000 Series routers
• Installs inside the router; no external gateway needed
• Supports G.711 and G.729a voice codecs
• Integrated echo cancellation improves call clarity
• SNMP enables remote monitoring and configuration
• Meets CISPR 22 and EN 55022:2010 requirements
• Works with Cisco 4451-X, 4221, 4321, 4331, 4351, and 4431 routers