• Cisco NIM-2FXO with FXO ports, RJ-11, and green circuit board
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Cisco

Cisco NIM-2FXO | 2x FXO analog ports | Universal PSTN | RJ-11 | Caller ID | Voice gateway

NIM-2FXO

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Description

Two-port FXO analog voice module for PSTN connectivity, ideal for branch voice fallback, local emergency calling, and legacy analog line integration. Supports caller ID and country-selectable impedance/tones for global deployments.

Features

- Dual FXO ports for compact analog PSTN connectivity
- Global deployment via country-selectable impedance and tones
- Resilient branch telephony with local breakout and survivability
- Caller ID support for enhanced user experience

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

- Ports: 2x FXO analog (RJ-11)
- Function: PSTN line interface for voice gateway and survivability
- Signaling: Loop start; polarity reversal detection
- Caller ID: FSK/DTMF (country dependent)
- Fax/Modem: T.38 fax relay and modem passthrough support (router features dependent)
- Regionalization: Software-selectable impedance, tones, and country profiles
- Voice resources: Requires PVDM4 DSPs for voice/media features
- Compatibility: NIM slot on ISR 4000 Series platforms
- Use cases: Local breakout, E911/112 access, analog line fallback
- Cabling: 2-wire analog to PSTN wall jack or telco demarc

FAQs

Q: Can this module connect standard analog phone lines?
A: Yes. Each FXO port connects to a PSTN analog line to provide voice gateway functionality.

Q: Is DSP hardware required?
A: Yes. PVDM4 DSPs on the host router are required for voice features such as conferencing, transcoding, and T.38.

Q: Does it support caller ID?
A: Yes, FSK/DTMF caller ID is supported where provided by the PSTN and enabled by the selected country profile.

Q: Which routers are compatible?
A: ISR 4000 Series routers with NIM slots (e.g., 4221, 4321, 4331, 4351, 4431, 4451-X).

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