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Cisco

Cisco NIM-2FXS/4FXO | Voice NIM | 2x FXS/FXS‑E/DID + 4x FXO | Analog Trunk/Station Gateway | RJ‑11

SKU:NIM-2FXS/4FXO

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Description

Add analog telephony to your ISR branch router with two FXS/FXS‑E/DID and four FXO ports for stations and PSTN trunks. Supports caller ID, modem/fax (T.38), and enterprise voice features when paired with router DSP resources.

Features

- Mixed FXS and FXO on one module for flexible station and PSTN connectivity
- Supports DID for direct inward analog routing
- Enterprise voice features with DSP resources on the router
- T.38 fax relay for reliable fax over IP
- Compact NIM form factor preserves chassis slots

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

Technical Specifications

- Module type: Network Interface Module (NIM) for ISR routers
- Analog interfaces: 2x FXS/FXS‑E/DID + 4x FXO
- Connectors: RJ‑11 ports
- Use cases: Analog phones, fax, modems, PSTN trunking
- Fax: T.38 fax relay (with DSP resources on router)
- Voice codecs: G.711, G.729a/b, iLBC (codec availability depends on router PVDM resources/licensing)
- Caller ID support: FSK/DTMF (region dependent)
- Signaling: FXS/FXO analog signaling with DID support
- Platform compatibility: ISR 4000 Series NIM slots (e.g., 4321/4331/4351/4431/4451‑X)
- DSP requirement: Requires PVDM4 resources on the host router for voice features
- Hot swap: Installation typically requires router power-down; follow platform guidelines

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