The primary models for Cisco SFP RJ45 transceivers, designed for copper-based Gigabit Ethernet applications, include the Cisco GLC-T, GLC-TE, and GLC-T-RGD, along with the SFP-GE-T and SFP-1G-T-X. These Cisco copper SFP modules enable network connectivity over standard twisted-pair cabling, typically supporting distances up to 100 meters.
What is Cisco SFP RJ45?
A Small Form-Factor Pluggable (SFP) is an industry-standard, cost-effective transceiver designed for Gigabit Ethernet applications that links switches and routers to the network. The Cisco SFP RJ45 is a hot-swappable input/output device that plugs into a Gigabit Ethernet port or slot. Unlike optical SFPs, these 1G copper SFP modules utilize an RJ-45 connector, allowing for connectivity over standard unshielded twisted-pair copper cabling.
Key features of Cisco SFP modules, including the RJ45 variants, typically include:
- Hot swappability: Maximizes uptime and simplifies serviceability.
- Media and interface flexibility: Allows a "pay as you populate" approach on a port-by-port basis.
- Robust design: Enhances reliability for network operations.
- Compact RJ-45 connector assemblies: Ensures uninterrupted network connectivity.
- SFP MSA Compliant: Adheres to Multi-Source Agreement standards for interoperability.
Cisco copper SFPs, such as the 1000BASE-T SFP, operate on Category 5 unshielded twisted-pair copper cabling for link lengths up to 100 meters (328 feet). These modules also support 10/100/1000 auto-negotiation and Auto MDI/MDIX functions.
Common Cisco SFP RJ45 Models
Cisco offers several Cisco SFP RJ45 model options to meet various environmental and application needs within copper networks. Here are some of the most common ones:
- GLC-T: Standard commercial temperature range Cisco copper SFP module. Operates from 0 to 70°C (32 to 158°F).
- GLC-TE: Extended temperature range version of GLC-T. Operates from -5°C to 85°C (23 to 185°F), suitable for wider temperature environments.
- GLC-T-RGD: Industrial temperature range model for harsh conditions. Functions from -40°C to 85°C (-40 to 185°F).
- SFP-GE-T: Extended temperature range copper SFP, compliant with NEBS 3 ESD standards.
- SFP-1G-T-X: Designed for 1G copper connectivity on 10G capable ports on Cisco switches and routers. Not compatible with 1G-only ports.
Comparison of Popular Cisco RJ45 SFP Transceiver Models
| Model | Max Distance | Connector | Auto-Negotiation | Operating Temp. Range | DOM Support | Typical Power | Notes |
| GLC-T | 100m | RJ-45 | 10/100/1000 | 0 to 70°C | No | 1W | Standard copper SFP for general use |
| GLC-TE | 100m | RJ-45 | 10/100/1000 | -5 to 85°C | No | 1W | For wider temperature environments |
| GLC-T-RGD | 100m | RJ-45 | 10/100/1000 | -40 to 85°C | No | 1W | Ruggedized for harsh industrial conditions |
| SFP-GE-T | 100m | RJ-45 | 10/100/1000 | -5 to 85°C | No | 1W | NEBS 3 ESD compliant, similar to GLC-TE |
| SFP-1G-T-X | 100m | RJ-45 | 10/100/1000 | -5 to 85°C | No | 2W | 1G connectivity in 10G capable ports only |
Compatibility and Usage
Cisco SFP RJ45 modules offer broad compatibility with a wide range of Cisco networking equipment, including Catalyst and Nexus series switches, ASR routers, and more. For precise compatibility, refer to Cisco’s official SFP Compatibility Matrix.
These 1G copper SFP modules are ideal for deploying Gigabit Ethernet over existing copper infrastructure, perfect for data centers, enterprise networks, and SMB environments where fiber is unavailable or impractical. They support auto-negotiation for 10/100/1000 speeds and Auto MDI/MDIX for seamless connectivity.
Note: Cisco recommends using genuine Cisco SFP modules to ensure optimal performance, compatibility, and support.
FAQs
Q1: What is the primary function of a Cisco SFP RJ45?
It provides Gigabit Ethernet copper connectivity, linking switches and routers to devices over twisted-pair cabling up to 100 meters.
Q2: Are Cisco GLC-T modules hot-swappable?
Yes, Cisco GLC-T and similar modules support hot swapping to maximize uptime.
Q3: What cable type does a Cisco RJ45 transceiver use?
They primarily use Category 5 unshielded twisted-pair (UTP) copper cabling for 1000BASE-T up to 100 meters.
Q4: Do Cisco SFP RJ45 models support Digital Optical Monitoring (DOM)?
No, most copper SFPs like GLC-T do not support DOM, which is typical for optical modules.
Q5: What is the maximum distance for a Cisco copper SFP?
The maximum operating distance is typically up to 100 meters (328 feet) over Cat5 or better copper cabling.
How to Choose the Right Cisco SFP RJ45 Module?
- Consider the operating temperature range based on your environment.
- Ensure module compatibility with your Cisco switch or router model.
- Check port speed capabilities (e.g., 1G vs 10G compatibility).
- Purchase genuine Cisco modules for best support and performance.
For a full selection of Cisco SFP RJ45 models, detailed specs, and configuration guides, visit router-switch.com today.