D-Link DEM-220T – 100BASE-BX-D Single-Mode 20km SFP Transceiver with Simplex LC Connector, TX 1550nm / RX 1310nm & Hot-Pluggable Design
Overview:
• The D-Link DEM-220T is a 100BASE-BX-D Single-Mode SFP Transceiver designed for installation in compatible SFP ports.
• It supports Fast Ethernet fiber transmission over a single-mode fiber optic cable with a distance up to 20km.
• The transceiver uses single-fiber bi-directional technology, transmitting and receiving data over one fiber strand using different wavelengths.
• The DEM-220T transmits at 1550nm and receives at 1310nm, and it is designed to be used in pairs with the matching DEM-220R transceiver.
• It features a Simplex LC connector, compact SFP metal housing, hot-swappable installation, and compliance with IEEE 802.3ah 100BASE-BX for reliable fiber network extension.
Key Features:
• 100BASE-BX-D SFP transceiver
• Single-mode fiber support
• Single-fiber bi-directional transmission
• Distance up to 20km
• TX 1550nm / RX 1310nm wavelength
• Simplex LC connector
• IEEE 802.3ah 100BASE-BX compliant
• Hot-swappable SFP design
• Compact metal SFP housing
• Designed for compatible D-Link switch SFP ports
• Suitable for MAN and service provider networks
• Works as a pair with DEM-220R
Technical Specifications:
General:
• Brand: D-Link
• Model: DEM-220T
• Product Type: 100BASE-BX-D Single-Mode SFP Transceiver
• Interface Type: SFP
• Connector Type: Simplex LC
• Fiber Type: Single-Mode Fiber
• Fiber Cable: 9/125µm Single-Mode Fiber
• Transmission Type: Bi-Directional over Single Fiber
• Application: Fast Ethernet Fiber Uplink, MAN Network, Service Provider Network, Long-Distance Fiber Link
Optical Specifications:
• Standard: IEEE 802.3ah 100BASE-BX
• Transmit Wavelength: 1550nm
• Receive Wavelength: 1310nm
• Maximum Distance: Up to 20km
• Transmission Power Range: -14 to -8dBm
• Reception Power Range: -32 to -3dBm
• Receiver Sensitivity: -32dBm
• Minimum Power Budget: 18dB
• Maximum Power Budget: 30dB
• Polishing Type: UPC
Power and Physical Specifications:
• Power Supply: 3.3V
• Power Source: 200mA
• Heat Release: 1.78kJ/hour
• MTBF: 3,259,763 Hours
• Dimensions: 55.5 × 13.4 × 11.28mm
• Weight: 19.1g
Compliance and Safety:
• EMI Certifications: FCC Class B, ICES-003 Class B, CE Class B, VCCI Class B
• Safety: TUV, UL, FDA
• RoHS: Compliant
Applications:
• Fast Ethernet fiber uplink
• Single-fiber network extension
• Switch-to-switch fiber connectivity
• Service provider networks
• Metropolitan Area Networks
• Long-distance fiber links up to 20km
• Remote site connectivity
• Enterprise fiber backbone
• Space-saving fiber deployment using one fiber core
Connect Gates Recommendation:
• Connect Gates recommends the D-Link DEM-220T for projects that require single-fiber Fast Ethernet SFP connectivity up to 20km.
• It is suitable when only one fiber core is available and a matched TX/RX wavelength pair is required.
• The DEM-220T should be paired with DEM-220R to complete the fiber link correctly.
• For proper installation, Connect Gates recommends checking switch SFP compatibility, fiber type, distance, LC connector compatibility, TX/RX wavelength direction, and the matching transceiver at the opposite end.