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SM-X-72FXS
Fixed Port High Density Analog Voice ServiceModule for ISR4K
Federal agencies and Fortune 500 operations source through ORM Systems.
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Enterprise Clients
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Ten years serving buyers who audit their vendors. From federal agencies to 20,000+ enterprise clients worldwide.
SM-X-72FXS is a high-density FXS telephony module engineered to bring legacy analog voice connectivity into modern IP-based communication systems. Built with 72 dedicated FXS ports featuring standard RJ-11 connectors, this module bridges traditional telephone lines with digital networks to ensure high-quality voice transmission alongside modern data services.
SM-X-72FXS is compatible with leading voice gateways and IP-PBX systems, including solutions from Cisco and Avaya, making it ideal for upgrading call centers, enterprise communications, and service provider networks. Its modular design and straightforward installation allow operators to efficiently expand capacity while meeting rigorous industry standards for performance and reliability.
SM-X-72FXS price is $9,025.00, a 47.2% saving from the Cisco list price of $17,107.00. SM-X-72FXS is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for SM-X-72FXS for additional pricing. Browse the full Cisco Catalyst 8000 Series Edge Platforms Modules & Cards series or explore all Cisco products.
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| SM-X-72FXS |  NIM-LTEA-EA |  C-SM-16P4M2X |  NIM-16A |  UCS-E160S-M3/K9 | |
|---|---|---|---|---|---|
| Compatibility | Cisco / Avaya | Cisco / Juniper / Arista / Dell / HP | Routers, Switches, Servers | Cisco / Juniper / Arista | Cisco UCS |
| Connector Type | RJ-11 | PCIe | RJ-45 | RJ-45 | SFP+ |
| Form Factor | Modular | Modular | PCIe | Modular | Modular |
| Module Type | FXS Module | 4G LTE | Ethernet | Ethernet | Ethernet |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Product Name | SM-X-72FXS | NIM-LTEA-EA | C-SM-16P4M2X 16-Port Ethernet Module | NIM-16A | Cisco UCS-E160S-M3/K9 |
| Product Type | Telephony Module | Network Module | Network Module / Network Card | Network Module Card | Network Module / Network Card |
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
72FXS voice service module provides stable high-density analog voice integration.
Reliable voice performance with consistent call quality.
Professional module for ISR4K deployments.
Smooth integration and dependable telephony support.
Strong voice capacity for enterprise environments.
Efficient analog service expansion with predictable uptime.
The SM-X-72FXS is a fixed-port analog voice module for Cisco ISR 4000 Series routers, delivering 72 FXS ports to integrate legacy telephony devices and IP networks.
The SM-X-72FXS is supported on Cisco ISR 4451-X, 4431, 4351, and 4321 platforms with an available SM-X expansion slot and compatible power supply.
The module provides 72 fixed FXS (Foreign Exchange Subscriber) ports for connecting analog telephones, fax machines, and key systems directly to an ISR4K router.
The SM-X-72FXS supports loop-start, ground-start, open-loop, and E&M signaling to accommodate a wide range of legacy voice network requirements.
It supports G.711 μ-law and A-law, G.729A/B, and G.726 codecs for efficient voice compression and excellent call quality over IP.
No separate license is required; voice port functionality is enabled by default on Cisco ISR4K platforms equipped with the SM-X-72FXS module.
Power down the router, insert the SM-X-72FXS into the SM-X expansion slot, secure the module with mounting screws, then power on and verify with “show platform” commands.
The module consumes up to 120W under full load; ensure your ISR4K power supply meets Cisco’s boost power requirements for voice modules.
No, the SM-X-72FXS is not hot-swappable; always power down the ISR4K router before installing or removing the module to avoid damage.
Software feature upgrades are supported via Cisco IOS XE images; hardware changes require a maintenance window and full power cycle.
With support for industry-standard codecs and echo cancellation, the module delivers carrier-grade voice quality and low latency for mission-critical voice applications.
Use Cisco IOS XE commands under voice-port configuration mode to define dial-peer sessions; for example, “dial-peer voice 1 pots destination-pattern 9T port 0/0/0:1.”
Yes, you can configure primary SIP or MGCP trunks with the SM-X-72FXS as a backup PSTN gateway, enabling automatic failover on carrier network outages.
Typical use cases include legacy PBX integration, site survivability for cloud telephony, fax over IP, and branch office analog voice consolidation.
You can order the SM-X-72FXS through Cisco authorized distributors and resellers or via Cisco’s online ordering portal using SKU SM-X-72FXS.
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