Cisco NIM-1GE-CU-SFP

Name: Cisco NIM-1GE-CU-SFP
Brand: Cisco
SKU: 1164
Price: 125.0 USD
Availability: InStock

1-port GE WAN NIM, dual-mode RJ45 & SFP

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US $125.00

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Product Highlights

Family

Modules

Brand

Cisco

Warranty

Lifetime (see details)

Availability

Usually Ships within 1-2 Days

Branch offices and remote sites demand reliable, high-speed WAN connectivity — but rigid, single-media interfaces can limit your deployment options and drive up cabling costs. The Cisco NIM-1GE-CU-SFP solves this by delivering a 1-port Gigabit Ethernet WAN Network Interface Module with dual-mode RJ45 and SFP support, giving you the freedom to connect over copper or fiber from a single combo port.

Designed for the Cisco 4000 Series Integrated Services Routers, this NIM brings flexible GE connectivity to platforms like the ISR 4221, 4321, 4331, 4351, and 4431. Whether you're establishing a primary WAN uplink, adding a secondary link for redundancy, or connecting to an upstream LAN switch, the NIM-1GE-CU-SFP adapts to your site's cabling infrastructure without requiring a module swap.

The module accelerates applications such as Ethernet WAN access, inter-VLAN routing, and high-speed connectivity to LAN switches and servers. Its compact NIM form factor occupies a single slot, leaving remaining NIM and SM-X bays available for voice, serial, or additional Ethernet modules. With auto-negotiation and a lightweight 240-gram design, the NIM-1GE-CU-SFP simplifies installation and reduces operational overhead across multi-site deployments.

Features & Benefits

Dual-Mode Copper & Fiber Connectivity

The NIM-1GE-CU-SFP provides a single combo port supporting both RJ45 copper and SFP fiber connections. This dual-mode design lets you match the interface to your site's existing cabling — deploy over Cat5e/6 copper at one branch and swap to an SFP fiber optic at another, all without changing the module hardware.

Cisco ISR 4000 Series Integration

Purpose-built for the Cisco 4000 Series ISR platform, this NIM slides into any available NIM slot on routers such as the ISR 4221, 4321, 4331, 4351, and 4431. Feature support is identical to the onboard GE and SFP ports on the router, ensuring consistent behavior and simplified management across all interfaces.

Compact, Lightweight Design

At just 1.25 × 3.50 × 7.24 inches and 240 grams, the NIM-1GE-CU-SFP is one of the most space-efficient ways to add a GE WAN port to your router. Its single-slot footprint preserves remaining NIM bays for voice, serial, or additional Ethernet expansion modules.

WAN Application Acceleration

The module accelerates key branch applications including Ethernet WAN access, inter-VLAN routing, and high-speed uplinks to LAN switches and servers. With Gigabit Ethernet throughput and auto-negotiation, it delivers reliable performance for data, voice, and video traffic at the network edge.

Deployment Scenarios

Branch Office WAN Uplink

Deploy the NIM-1GE-CU-SFP in an ISR 4000 Series router at a branch office to establish a dedicated Gigabit Ethernet WAN uplink to headquarters or a service provider handoff. The dual-mode port lets you connect via copper RJ45 or fiber SFP depending on the carrier's demarcation equipment.

Redundant WAN Link for High Availability

Add the NIM-1GE-CU-SFP as a secondary WAN interface alongside the router's onboard ports to create a redundant uplink path. Combined with routing protocols like OSPF, EIGRP, or BGP, this provides automatic failover and improved WAN resilience for business-critical sites.

Small Office / Retail Site Connectivity

In small offices or retail locations where a separate LAN switch may not be justified, use the NIM-1GE-CU-SFP to provide an additional GE port for connecting a server, IP phone system, or point-of-sale infrastructure directly to the router.

1-Port Gigabit Ethernet WAN — Expand your ISR 4000 router with a dedicated GE uplink for WAN connectivity

Dual-Mode RJ45 & SFP — Choose copper or fiber connectivity from a single combo port to match your infrastructure

Cisco 4000 Series ISR Compatible — Supported on ISR 4221, 4321, 4331, 4351, and 4431 platforms

Compact NIM Form Factor — Occupies a single NIM slot, preserving remaining slots for voice, WAN, or other modules

Auto-Negotiation Support — Automatically detects speed and duplex settings for simplified deployment

Ethernet WAN Access & Inter-VLAN Routing — Accelerate branch applications with high-speed GE connectivity

Lightweight & Low Profile — Just 240 g and 1.25 × 3.50 × 7.24 in. for easy installation in tight rack spaces

General

Part Number

NIM-1GE-CU-SFP

Description

1-port GE WAN NIM, dual-mode RJ45 & SFP

Manufacturer

Cisco

Product Family

Cisco NIM (Network Interface Module)

Form Factor

Network Interface Module (NIM)

Supported Platforms

Cisco 4000 Series Integrated Services Routers (ISR 4221, 4321, 4331, 4351, 4431)

Interfaces

Port Count

Port Type

Combo GE (RJ45 copper + SFP)

Ethernet Interface Type

Gigabit Ethernet

Data Rate

1000 Mbps

Connector Types

RJ45, SFP (mini-GBIC)

Physical

Dimensions (H × W × D)

1.25 × 3.50 × 7.24 in. (32 × 89 × 184 mm)

Weight

240 g

Environmental

Operating Temperature

32 to 104°F (0 to 40°C)

Storage Temperature

–38 to 150°F (–40 to 70°C)

Operating Humidity

5% to 85% (non-condensing)

Storage Humidity

5% to 95% (non-condensing)

Compatibility Notes

Supported Cisco ISR Platforms

ISR 4221 (ISR4221/K9) — 2 NIM slots
ISR 4321 (ISR4321/K9) — 2 NIM slots
ISR 4331 (ISR4331/K9) — 2 NIM slots
ISR 4351 (ISR4351/K9) — 3 NIM slots
ISR 4431 (ISR4431/K9) — 3 NIM slots

The SFP port accepts Cisco-compatible SFP transceivers (sold separately). Consult the Cisco SFP compatibility matrix for supported optics on the ISR 4000 platform.

Downloads & Resources

Cisco 4000 Series ISR GE WAN Modules Data Sheet (PDF)

Connecting the Cisco NIM-1GE-CU-SFP and NIM-2GE-CU-SFP (Installation Guide) (cisco.com — search 'Connecting the Cisco NIM-1GE-CU-SFP' in the Cisco Support documentation library)

Configuring the Cisco NIM-1GE-CU-SFP and NIM-2GE-CU-SFP (Configuration Guide) (cisco.com — search 'Configuring the Cisco NIM-1GE-CU-SFP' in the Cisco Support documentation library)

Frequently Asked Questions

The NIM-1GE-CU-SFP is supported on the Cisco 4000 Series ISR family, including the ISR 4221, 4321, 4331, 4351, and 4431. It installs into any available NIM slot on these platforms.

No. The NIM-1GE-CU-SFP is a dual-mode combo port — only one interface (RJ45 or SFP) can be active at a time. The module provides flexibility to choose copper or fiber, not simultaneous connections.

The SFP slot accepts Cisco-compatible SFP transceivers. Refer to the Cisco SFP compatibility matrix for the ISR 4000 platform to confirm supported optics. SFP transceivers are sold separately.

Online Insertion and Removal (OIR) support depends on the host router platform and IOS XE version. Consult the Cisco ISR 4000 Series configuration guide for OIR details specific to your router model.

The NIM-1GE-CU-SFP provides one dual-mode GE/SFP combo port, while the NIM-2GE-CU-SFP provides two. Both share the same NIM form factor and ISR 4000 compatibility. Choose the 2-port version if you need two WAN uplinks from a single NIM slot.

Part Number	Product	Key Difference
NIM-2GE-CU-SFP	Cisco 2-Port GE WAN NIM	Provides 2 dual-mode GE/SFP combo ports instead of 1 — ideal when you need two WAN uplinks in a single NIM slot.
NIM-ES2-4	Cisco 4-Port GE LAN Switch NIM	A 4-port Layer 2 GE LAN switch module for LAN-side switching rather than WAN uplink connectivity.
NIM-ES2-8	Cisco 8-Port GE LAN Switch NIM	An 8-port Layer 2 GE LAN switch module — choose this when you need integrated LAN switching, not a WAN interface.
EHWIC-1GE-SFP-CU	Cisco 1-Port GE EHWIC (SFP/CU)	Legacy EHWIC form factor for ISR G2 (2900/3900) routers — the NIM-1GE-CU-SFP is the ISR 4000 equivalent.