DEM-436XT-BXD Compatible 10G BiDi SFP+ 20km, Tx1330/Rx1270

EdgeOptic's DEM-436XT-BXD compatible is a D-Link-coded Tx1330/Rx1270 version of the EdgeOptic BIDI-10G-SFP-20B multi-vendor 10G BiDi SFP+ transceiver. It carries D-Link-recognized identification data, so D-Link switches with 10G SFP+ ports read it as a matching module. The 10GBASE-BX20-D designation marks the downstream B-side of a bidirectional pair: it transmits at 1330 nm and receives at 1270 nm over a single strand of single-mode fiber.

Bidirectional operation carries both directions on one fiber, halving the fiber count of a conventional duplex link. The DEM-436XT-BXD is the downstream end of the pair and must connect to an upstream A-side module that transmits at 1270 nm and receives at 1330 nm, such as the DEM-436XT-BXU. Reach is 20 km over single-mode fiber, with a 9 dB link budget covering connector and splice loss across the span. The module uses a single LC/UPC connector.

The optical interface uses a DFB laser transmitter and a PIN photodiode receiver. Transmit power runs from −5 dBm to 0 dBm, receiver sensitivity is better than −14.5 dBm, and the receiver tolerates input up to +4 dBm before overload. The module runs on a single +3.3 V supply across a 0 to 70 C operating range and supports digital optical monitoring, so host equipment can read live temperature, supply voltage, laser bias, and optical power. Build and safety compliance follows the SFP MSA and SFF-8431, with Class 1 laser rating per IEC 60825-1.

The DEM-436XT-BXD handles 10 Gigabit Ethernet and Gigabit Ethernet traffic on D-Link campus switching platforms with 10G SFP+ ports. Before ordering for a specific switch model, verify the part against the D-Link transceiver compatibility matrix for that chassis, or contact our sales team.

Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms, the DEM-436XT-BXD compatible ships next business day from EU stock with a lifetime warranty.