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Cisco

Cisco SM-X-16FXS/2FXO | Analog voice module | 16x FXS + 2x FXO | ISR 4K SM-X

SKU:SM-X-16FXS/2FXO

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Description

High-density analog voice service module for ISR 4000 routers providing 16 FXS ports for analog endpoints and 2 FXO ports for PSTN connectivity. Ideal for branch voice migration and legacy device support.

Features

- Consolidates high-density analog voice on a single module
- Supports both station (FXS) and trunk (FXO) connectivity
- Simplifies legacy device support during IP telephony migration
- Centralized management through the host router
- Space- and cost-efficient versus external analog gateways

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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FAQs

Technical Specifications

FAQs

Q: Is this module compatible with ISR 4000 routers?
A: Yes. It installs in SM-X slots on ISR 4000 Series routers.

Q: Do I need additional licenses or DSP resources?
A: Voice features may require appropriate platform licenses and DSP resources on the host router. Check your specific ISR model configuration.

Q: Can I mix this with other SM-X or NIM modules?
A: Yes, provided the chassis has available slots and sufficient power budget.

Technical Specifications

- Form factor: SM-X service module for ISR 4000 Series
- Port configuration: 16 x FXS, 2 x FXO
- Use cases: Analog phones, fax machines, modems, paging systems; PSTN trunk access
- Signaling: Analog loop-start support
- Integration: Managed through the host router OS and voice features
- Platform compatibility: ISR 4331/4351/4431/4451/4461 (SM-X slot required)
- Power: Draws power from host chassis (no external PSU required)

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