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Compact metal box with RJ45 and SFP ports, status LEDs, and DC power jack

PLANET

PLANET GST-805A 10/100/1000Base-T to 1000Base-SX/LX SFP transceiver

SKU CH-G5SB-YS9PK MPN GST-805A

Converts 10/100/1000Base-T copper to 1000Base-SX/LX fibre with SFP slot, auto MDI/MDI-X and DIP-switch smart management

  • Device TypeConverter
  • Media ConversionRJ45 - SX/LX
  • StandardsIEEE 802.3, 10Base-T IEEE 802.3u, 100Base-TX IEEE 802.3ab, 1
  • Fiber Cable50/125µm or 62.5/125µm multi-mode fiber cable, up to 220 / 5
  • Frame Size9K
  • Ports1 x 10/100/1000Base-T port 1 x 1000Base-SX/LX port
  • Extends network reach up to 120km over single-mode fiber
  • Handles 10/100/1000Base-T to 1000Base-SX/LX media conversion reliably
  • Auto MDI/MDI-X simplifies copper link setup without crossover cables
  • Operates from 0 to 50°C for industrial-grade temperature tolerance
  • Compact 1.02 x 3.19 x 3.70 inch design fits tight spaces

Media Converter for Gigabit Networks

The PLANET GST-805A converts signals between a 10/100/1000Base-T RJ-45 port and a 1000Base-SX/LX SFP slot. It supports IEEE 802.3, 802.3u, 802.3ab and 802.3z standards with auto MDI/MDI-X. A DC 5V 2A power adapter is included for standalone operation.

Suits Copper-to-Fiber Links, Not Direct SFP Use

This unit suits installers extending a copper link over multi-mode fibre up to 550 m or single-mode fibre up to 120 km using an SFP module. It does not suit buyers who need a bare SFP transceiver without a converter chassis, or those requiring 10 GbE speeds. Management features are configured via DIP switch only.

Plug-and-Play Install with Module Caution

Installation is plug-and-play: connect the RJ-45 cable, insert a compatible SFP module, attach fibre and apply power. The compact enclosure fits a chassis or desktop. The main issue is selecting an SFP module whose distance rating matches the fibre type and link length, otherwise the link will not come up.

Highlights

  • Extends network reach up to 120km over single-mode fiber
  • Handles 10/100/1000Base-T to 1000Base-SX/LX media conversion reliably
  • Auto MDI/MDI-X simplifies copper link setup without crossover cables
  • Operates from 0 to 50°C for industrial-grade temperature tolerance
  • Compact 1.02 x 3.19 x 3.70 inch design fits tight spaces

Specifications

BrandPLANET
ModelGST-805A
Device TypeConverter
Media ConversionRJ45 - SX/LX
StandardsIEEE 802.3, 10Base-T
IEEE 802.3u, 100Base-TX
IEEE 802.3ab, 1000Base-T
IEEE 802.3z, 1000Base-SX/LX
IEEE 802.3ah OAM
Fiber Cable50/125µm or 62.5/125µm multi-mode fiber cable, up to 220 / 550m.
9/125µm single-mode cable, provides long distance for 10 / 20 / 30 / 40 / 50 / 70 / 120km (vary on fiber transceiver or SFP module)
Frame Size9K
Ports1 x 10/100/1000Base-T port
1 x 1000Base-SX/LX port
LEDsPWR (Green)
TP: 1000, LINK/ACT
Fiber: LINK/ACT
Power AdapterDC 5V / 2A
TemperatureOperating: 0 - 50 degree Celsius
Storage: -40 - 70 degree Celsius
Humidity5 - 90% non-condensing
FeatureStandards:
Complies with IEEE 802.3 10Base-T, IEEE 802.3u 100Base-TX, IEEE 802.3ab 1000Base-T, IEEE 802.3z 1000Base-SX/LX Ethernet Standard
Interface:
One 10/100/1000Base-T port with RJ-45 connector
One 1000Base-SX/LX port with LC/SC/WDM connector supporting multi-mode or single-mode fiber optic cable
Auto-negotiation and Auto-MDI / MDI-X for 10/100/1000Base-T port
Layer 2 Features:
Back-pressure and IEEE 802.3x compliant flow control and full wire-speed forwarding rate
9K Jumbo Frame size supported
Link Loss Return (LLR) switch on each fiber optic to aid in troubleshooting remote ne
Dimensions1.02" x 3.19" x 3.70"
Weight0.44 lb.
Shipping weight0.91 kg
Package size170 × 157 × 103 mm

Questions about this item

What SFP transceiver module do I need to connect the GST-805A to single-mode fiber at 20 km?

Choose an SFP module rated for 1000Base-LX on 9/125 µm single-mode fiber with a 20 km reach. The GST-805A accepts any standard SFP, so match the module to your distance and wavelength.

Will the RJ-45 port auto-negotiate with a legacy 100Base-TX switch?

Yes. The TP port supports IEEE 802.3u 100Base-TX and IEEE 802.3ab 1000Base-T with auto-negotiation and auto MDI/MDI-X, so it will link at 100 Mbps or 1 Gbps automatically.

Which front-panel LEDs confirm a healthy fiber link after I install the module?

The green PWR LED shows power. The Fiber LINK/ACT LED lights solid when the SFP module detects a valid 1000Base-SX/LX link and blinks during traffic.

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