SFP module Cisco GLC-T-RFB 1000BASE-T 1000 Mbps RJ‑45 copper

Cisco GLC-T-RFB 1000BASE-T is a compact SFP transceiver module that delivers Gigabit Ethernet connectivity over standard copper cabling. The module fits into SFP ports on compatible Cisco switches and routers and provides a 1000 Mbps RJ-45 interface for short-distance copper links. It is intended for network uplinks, server connections and edge links where a standard 1000BASE-T copper connection is required. The product name, Cisco GLC-T-RFB 1000BASE-T 1000 Mbps RJ‑45 copper, identifies the form factor, interface type and supported speed.

Advantages

The Cisco GLC-T-RFB module offers compact SFP form factor compatibility with a wide range of Cisco devices that accept GLC-series modules, enabling flexible port configurations and hot-swappable installation. It provides standard 1000BASE-T performance over Cat5e/Cat6 copper cabling, supports auto-negotiation for speed and duplex, and uses a familiar RJ-45 interface for straightforward integration into existing copper-based network infrastructure. The module is designed by Cisco and carries the manufacturer part number GLC-T-RFB.

Suitable for

• Gigabit uplinks between switches and routers using copper cabling
• Server NIC to switch connections where RJ-45 copper is preferred
• Edge or access links in data center and enterprise networks
• Hardware upgrades to add SFP-based copper ports to compatible Cisco devices

Key specifications

• Brand: Cisco
• Manufacturer part number (MPN): GLC-T-RFB
• Form factor: SFP (Small Form-factor Pluggable)
• Standard: 1000BASE-T
• Data rate: 1000 Mbps (Gigabit Ethernet)
• Interface: RJ-45 copper
• Cabling: Category 5e/6 copper (short-distance links)

How to use

Insert the Cisco GLC-T-RFB SFP module into an available SFP port on a compatible Cisco switch or router until it latches. Connect a suitable RJ-45 copper patch cable between the module and the remote device. Confirm link status and speed via the device management interface or status LEDs; the module supports auto-negotiation to establish Gigabit speed and duplex. For hot-swap operation, ensure the network device supports insertion and removal while powered, and follow your equipment’s safety guidelines to avoid disrupting traffic.

Usage recommendations

Use Cat5e or better copper cabling for reliable 1000 Mbps links and keep cable runs within industry-recommended distances for 1000BASE-T (typically up to 100 meters). Verify device compatibility with Cisco GLC-series SFP modules and ensure firmware or platform support if required. For critical links, test the module and cable in your environment before deployment and maintain ESD precautions when handling the SFP transceiver.