Original NIM-2FXS Cisco 4000 Router Modules 2 Port Cisco FXS Card Support Voice

Original NIM-2FXS Cisco Network Module 4000 Series 2-Port FXS Interface Module

Product Information

Since the fourth-generation Cisco NIMs have their own DSP to support voice, there is no need to synchronize the clock to the backplane, and the clock-participate command is not supported in the BRI, FXO/FXS, and E/M NIMs. The NIMs support:

• Caller line ID
• G.711, G.729a, and G.726
• G723 and Internet Speech Audio Codec (iSAC); Internet Low Bit Rate Codec (iLBC) is on the roadmap
• Fax detection, pass-through, and relay (T.38)
• Modem detection and pass-through
• Dual-tone multifrequency (DTMF) detection
• Echo cancellation
• Voice activity detection
• Comfort noise generatio
• Real-Time Control Protocol (RTCP)
• Acoustic shock protection
• Noise reduction is on the roadmap
• Real-Time Transport Protocol (RTP)
• RFC 4733 Digit Relay

The FXS features include:

• Capable of supporting either FXS or DID functionality
• Configurable long loop ports
• Message waiting indicator (MWI)
• Cable detection

Table 1 Quick Spec.

Table 2 shows the comparison between NIM-2FXS/4FXO and NIM-2FXS.

Table 3 Cisco FXO and FXS NIM Types and Feature Comparison

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