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Cisco

Cisco SM-D-72FXS | 72 FXS | RJ21 Amphenol | SIP/SRST | T.38 Fax | ISR Service Module (Double-wide)

SKU:SM-D-72FXS

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Description

High-density 72-port FXS analog service module for compatible routers with a double-wide SM bay. Ideal for large analog phone, fax, and paging deployments integrated with IP telephony via SIP and SRST. Uses RJ21 (50-pin) connectors for efficient punch-down or patch-panel wiring.

Features

- Ultra-high FXS density per chassis
- Clean RJ21-based wiring to punch-down fields
- Standards-based SIP interoperability
- SRST for local call survivability
- Flexible deployment for analog phones, fax, and paging

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

- Ports: 72x FXS via 3x RJ21 50-pin connectors (24 ports per RJ21)
- Form factor: Double-wide Service Module (SM)
- Compatibility: Requires router chassis with double-wide SM bay (select ISR platforms)
- Call control: SIP to CUCM/ITSP; SRST for survivability
- Fax: T.38 and passthrough
- Codecs: G.711 a/u, G.729a/b
- Signaling: loop start, caller ID (FSK/DTMF)
- Wiring: RJ21 to 110/66 blocks or patch panels

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