Cisco NIM-4FXS

Cisco NIM-4FXS Overview

The NIM-4FXS is a network interface module used in Cisco routers, specifically in the Cisco ISR (Integrated Services Router) series. The “4FXS” in NIM-4FXS stands for “Foreign Exchange Station,” with “4” indicating the number of FXS ports on the module. An FXS interface is used to connect analog devices like standard telephones or fax machines to a VoIP network.
The NIM-4FXS provides 4 FXS ports for analog voice services. It allows analog devices to connect to a VoIP network, enabling services like voice calls, faxing, and other analog-based communication over IP networks.The NIM-4FXS module is compatible with Cisco ISR 4000 Series routers, such as the Cisco 4321, 4331, 4351, 4431, and 4451 models.
This product Supports various voice features such as Caller ID, Voice Activity Detection (VAD), Comfort Noise Generation (CNG), Echo Cancellation, and more. These features enhance the quality of voice communication.

Use Cases

• Small Office/Home Office (SOHO): Where analog devices need to be connected to a VoIP network.
• Branch Offices: For analog device connectivity in a branch office setup using Cisco ISR routers.
• Analog Phone Integration: In environments where legacy analog phones are still in use but need to be integrated into modern IP telephony systems.

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