Cisco NIM-4FXSP 4-Port FXS Analog Voice Network Interface Module
Save significantly over new list price on this professionally refurbished Cisco NIM-4FXSP 4-port analog voice module — backed by Reef Telecom's industry-leading 10-year warranty. Ideal for connecting analog phones, fax machines, paging systems, and DID trunks to your Cisco ISR 4000 Series router.
Key Specifications
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Part Number: NIM-4FXSP
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Ports: 4x FXS/FXS-E/DID analog voice ports (RJ-11)
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Compatibility: Cisco ISR 4300 and 4400 Series routers, VG420 and VG450 Voice Gateways
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Onboard DSP: Dedicated digital signal processor — no PVDM required on the motherboard
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Echo Cancellation: Up to 128ms echo-tail length
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Codec Support: G.711, G.729a, G.729ab, G.723, iSAC, and more
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Voice Protocols: SCCP, SIP, H.323, MGCP 1.0
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UC Integration: Cisco Unified Communications Manager (CUCM), CME, SRST, and CUBE
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Hot-Swappable: Supports Online Insertion and Removal (OIR) for zero-downtime deployment
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Fax Support: T.38 fax relay and pass-through
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Software Requirement: Cisco IOS XE 16.5 or later
Common Use Cases
- Branch office analog phone and fax connectivity
- Warehouse phones, elevator lines, overhead paging, and door phones
- Legacy PBX-to-VoIP migration — preserve existing analog endpoints
- Direct Inward Dial (DID) trunk integration from PSTN
- Emergency and alarm line connectivity
Why Buy from Reef Telecom?
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10-Year Warranty on all refurbished equipment
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Free Shipping on orders over $300
- Professionally tested and restored to full working condition
- Trusted B2B telecom equipment supplier
Note: The NIM-4FXSP is not compatible with Cisco 2900 or 3900 Series ISRs. Requires a NIM slot on a supported Cisco 4000 Series ISR or VG4xx Voice Gateway.
