Planet GST-805A 10/100/1000Base-T to 1000Base-LX/SX(mini-GBIC, SFP) Smart Media Converter-distance depends on SFP module
- 1 x 10/100/1000Base-T port
- 1 x 1000Base-SX/LX port
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The Planet GST-80x series Smart Media Converters offer a quick and efficient solution for conversion between 10/100/1000Base-T and 1000Base-LX/SX network. These converters accept various types of Ethernet Media on an RJ-45 port and offer stable Gigabit fiber performance. It features plug & play and smart management functions for minimized downtime. With compact design, the converter can be used standalone, or be installed into media converter chassis (sold separately).

Distance Extension with High Performance and Steady Network Communication
PLANET GST-80x Smart Gigabit Media Converter series extends communication distance with high Gigabit performance via fiber optical cable. The GST-80x series provides media conversion between 10/100/1000Base-T and 1000Base-SX/LX interfaces such as multi-mode LC/SC connectors (220m / 550m), single-mode LC/SC connectors (10/20/30/40/50/70/120km) and single fiber connectors (WDM,15/60km) for various fiber optic applications.
Enhanced Smart Management Features
The GST-80x series provides auto MDI/MDI-X on its TP port and the DIP switch to configure the available smart functions including the auto-negotiation / force for fiber interface and Link Pass-through function (LLCF/LLR). The Link Loss Carry Forward (LLCF) function works with Link Loss Return (LLR) to diagnose network connections. Also, the LLR function can immediately alert network administrator to the media link issue and provide efficient solution to monitoring the entire network.
Easy Installation
The GST-80x series allows two segments to connect easily. The Smart Media Converter can be used as a standalone unit when powered by its DC adapter or used as a slide-in module to PLANET 19-inch managed 16-slot media converter chassis (MC-1610MR / MC-1610MR48). When working with the Managed media converter chassis, the GST-80x is able to be managed and its status can be monitored through the local RS-232 console and remote web interface.
Applications
Fiber-Optic Networking for ISP, Enterprise, and Home
PLANET GST-80x provides advanced media conversion technology - 10/100/1000Base-T and 1000Base-SX/LX interfaces to fulfill different kinds of demands as the current network grows and expands. The GST-80x provides diverse fiber connect type options for different network applications. It is very flexible for the GST-80x to work as a standalone device or be installed in the central management media converter chassis for centralized management. When working with the management media converter chassis, the GST-80x is hot swappable to avoid network downtime. The GST-80x is the ideal solution to building a network solution of FTTH (Fiber to the Home) or FTTC (Fiber to the Curb), and FTTB (Fiber to the Building) for ISPs, campuses and enterprises.

Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 2 years
- Limited Warranty period (labor): 2 years
- Read full details
Return Policies
- Return for refund within: 15 days
- Return for replacement within: 15 days
- This item is covered by Newegg.com's 15-Day Return Policy.
- Read full return policy for details.
Manufacturer Contact Info
- Manufacturer Product Page
- Manufacturer Website
- Support Phone: 800-989-2797
- Support Email: sales@planetechusa.com
- Support Website
- View other products from PLANET
The PLANET GST-805A is a Gigabit Ethernet media converter that links one 10/100/1000Base-T RJ45 connection to a 1000Base-SX/LX fiber connection, making it suitable for extending copper Ethernet networks over fiber; reach depends on the fiber and transceiver or SFP module used.
Recommended For
- Network installers extending a single gigabit Ethernet connection between locations over existing fiber, such as between buildings or to a remote network endpoint. The fiber reach depends on the selected SFP module.
- IT teams matching a copper Ethernet device to an installed single-mode or multimode fiber link, provided they select a compatible 1000BASE-X SFP for the fiber type and required distance.
- Network technicians diagnosing fiber-link issues who can use the converter’s Link Loss Return and Link Loss Carry Forward functions to help identify connection problems.
- Organizations deploying several fiber-to-copper links that want to use compatible PLANET managed media-converter chassis for centralized installation and optional redundant power.
Real-World Use Scenarios
- To connect a copper-only switch or router to a fiber network, install the GST-805A at the copper device and use a compatible SFP and fiber link; it provides a Gigabit Ethernet handoff between the two media types.
- For a fiber link between buildings, use the converter where the network equipment has only Ethernet copper; fiber can span the distance, while the actual supported reach depends on the SFP module and fiber used.
- When extending a wired network to a campus, office area, or other remote site, pair the copper Ethernet connection with a fiber run; the converter bridges the local RJ45 equipment to the fiber segment without requiring that device to have an SFP port.
- When reusing an existing fiber run to connect a copper-only endpoint, choose an SFP that matches the fiber type and the equipment at the far end; once connected, link/activity LEDs help confirm whether the copper and fiber sides have link.
- In a network closet with several fiber-to-copper links, install multiple converters in a compatible PLANET managed media-converter chassis for a centralized installation instead of powering each converter as a separate standalone unit.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | Converting a 10/100/1000Base-T copper Ethernet connection to a 1000Base-SX/LX fiber link |
| Conversion And Ports | One RJ-45 10/100/1000Base-T port and one 1000Base-SX/LX fiber port; fiber connector options include LC, SC, or WDM, with mini-GBIC/SFP module support |
| Fiber Compatibility And Distance | Supports 50/125µm or 62.5/125µm multimode fiber up to 220 or 550m, and 9/125µm single-mode fiber for listed distances of 10–120km, depending on the transceiver or SFP module |
| Standards And Traffic Handling | Supports IEEE 802.3, 802.3u, 802.3ab, 802.3z, and 802.3ah OAM; includes 9K jumbo frames, back-pressure, IEEE 802.3x flow control, and full wire-speed forwarding |
| Management And Diagnostics | DIP switches configure fiber auto-negotiation or manual mode and LFP; LLR and LLCF support link troubleshooting. Managed-chassis features include bandwidth control, TS-1000/IEEE 802.3ah OAM, and loopback testing |
| Power And Operating Environment | DC 5V / 2A adapter; operates at 0–50°C, with storage from -40–70°C and 5–90% non-condensing humidity |
| Physical Specifications | 1.02 × 3.19 × 3.70 inches; 0.44 lb |
| Model Identifiers | PLANET GST-805A |


