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2FXO Ports For PSTN Backup & VoIP Integration Cisco NIM-2FXO Module

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2FXO Ports For PSTN Backup & VoIP Integration Cisco NIM-2FXO Module

Brand Name : Cisco

Model Number : NIM-2FXO=

Usage : For data transfer and power supply

Certifications : RoHS, UL, CE, etc.

Flash Memory : 8 GB

Supported Standards : IEEE 802.3, IEEE 802.3u, IEEE 802.3ab

Maximum ACL entries : 4000

Product Size : 10cm x 5cm x 2cm

Mtbf : 1,000,000 hours

Humidity Range : 10 to 90% (non-condensing)

Maximum Power Consumption : 715W

Warranty : 1 year

Product Protocol : Ethernet

Product Power Supply : Internal power supply

Product Uplink Ports : 6 x 40 Gigabit Ethernet QSFP+ ports

Product Form Factor : Plug-in module

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2FXO Ports For PSTN Backup & VoIP Integration Cisco NIM-2FXO Module

The Cisco NIM-2FXO Module is a high-performance Network Interface Module (NIM) designed for Cisco ISR 4000 Series routers, enabling seamless integration of traditional PSTN (FXO) lines with modern VoIP networks. Ideal for businesses transitioning to IP telephony while maintaining analog fallback, this module ensures reliable voice connectivity, enhanced redundancy, and cost-effective migration.

Key Features & Benefits

✔ Dual FXO Ports – Connect two PSTN lines for analog telephony backup or hybrid deployments.
✔ VoIP & PSTN Integration – Supports Cisco Unified Communications Manager (CUCM) for smooth IP telephony migration.
✔ Failover & Redundancy – Automatically switches to PSTN if IP network fails, ensuring uninterrupted business communications.
✔ Enterprise-Grade Voice Quality – Features echo cancellation, noise reduction, and QoS prioritization for crystal-clear calls.
✔ Flexible Deployment – Hot-swappable NIM module for easy installation in Cisco ISR 4321, 4331, 4351, and 4431 routers.
✔ Secure & Scalable – Supports SIP, H.323, and SRTP/TLS encryption for secure voice transmission.

Technical Specifications (NIM-2FXO=)

Parameter Details
Ports 2 x FXO (RJ-11)
Compatibility Cisco ISR 4000 Series
Protocols SIP, H.323, MGCP
Voice Codecs G.711, G.729, G.726
QoS Support DSCP, ToS, LLQ
Security SRTP, TLS, SIP over TLS
Dimensions 1.5 x 4.5 x 4.3 in (HxWxD)

Ideal Use Cases

  • Businesses needing PSTN backup for VoIP systems.

  • Branch offices requiring analog telephony support.

  • Hybrid UC deployments with Cisco Unified Communications.

Why Choose Cisco NIM-2FXO?

As part of Cisco’s reliable networking ecosystem, this module ensures future-proof voice solutions with scalability, security, and seamless integration. Whether upgrading legacy systems or ensuring failover reliability, the NIM-2FXO module delivers enterprise-grade performance.

Upgrade your voice infrastructure today with Cisco’s trusted NIM technology!


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