• Cisco SM-X-8FXS/12FXO 8x FXS + 12x FXO analog voice module for ISR 4000
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Cisco

Cisco SM-X-8FXS/12FXO | 8x FXS + 12x FXO analog voice module | ISR 4000 mixed endpoint and PSTN

SM-X-8FXS/12FXO

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Description

Combine analog endpoint support with PSTN connectivity on ISR 4000 routers using 8 FXS ports for phones/fax and 12 FXO ports for analog trunk lines. Ideal for hybrid deployments bridging legacy analog devices and local PSTN access to IP voice systems.

Features

- Balanced mix of station (FXS) and trunk (FXO) interfaces
- Simplifies PSTN access and analog device support in one module
- Seamless integration with IOS XE voice routing and policies
- Cost‑effective migration path from legacy telephony to IP
- Centralized management from the ISR 4000 platform

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

- Interfaces: 8x FXS (analog stations) + 12x FXO (analog trunks)
- Platform: SM‑X service module for ISR 4000
- Use cases: Hybrid PBX, branch survivability, analog fax and modem support
- Integration: IOS XE voice features and dial‑plan routing
- Cabling: Breakout to RJ‑11 via high‑density connectors and accessories
- DSP: Router‑based DSP resources required for advanced voice features
- Compatibility: Works with IP telephony and SIP integration on the router

FAQs

Q: What’s the difference between FXS and FXO on this module?
A: FXS ports connect to analog endpoints like phones or fax, while FXO ports connect to analog PSTN lines for trunk access.

Q: Is caller ID supported?
A: Yes. Caller ID support is provided via IOS XE voice features, subject to regional settings and line compatibility.

Q: Do I need external power for ringing on FXS ports?
A: No. The FXS interfaces provide the ringing voltage required for standard analog handsets.

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