D-Link DEM-S28X01Q-SR Compatible 25GBASE-SR SFP28 for DQS-Series Data Center Switches

EdgeOptic's DEM-S28X01Q-SR compatible is a D-Link-coded version of the EdgeOptic 25G-SFP28-100 multi-vendor SFP28 dual-rate 10G/25G SR transceiver. DEM-S28X01Q-SR is D-Link's ordering code for a 25GBASE-SR SFP28 specified against the D-Link DQS-series data-center switches with 25G SFP28 interfaces. The module is programmed with D-Link-recognized EEPROM vendor and part-number strings so the DQS-series switch reads the optic against its native transceiver table.

Optical behavior is 25GBASE-SR per IEEE 802.3by Clause 112 over duplex multi-mode fiber, with 10GBASE-SR support per IEEE 802.3ae on dual-rate SFP28 host ports. Line signaling rate is 10.3125 Gbps at 10GBASE-SR and 25.78125 Gbps at 25GBASE-SR. Reach is 100 m on OM4 and 70 m on OM3, all within the SFP28 SerDes envelope defined by SFP28 MSA SFF-8402.

Optical path is 850 nm VCSEL transmitter, PIN photodiode receiver, TX optical power −5 to +2.4 dBm, RX sensitivity better than −10.3 dBm, 5.3 dB link budget, LC/UPC duplex connector. Digital diagnostics are SFF-8472 compliant, exposing per-module temperature, supply voltage, TX bias, TX power and RX power through the standard D-Link switch transceiver-diagnostics interface. Power dissipation is 0.3 W, the module is hot-swappable, and the operating temperature range is 0 to 70°C commercial.

The primary in-scope platform is the D-Link DQS-5000-54SQ28 data-center switch, which ships with 48 SFP28 25G ports and 6 QSFP28 100G ports per D-Link's product documentation. DEM-S28X01Q-SR sits on the 25G SFP28 cages of the DQS-series platforms. The DXS-3610 range may carry 25G uplinks depending on the specific SKU revision; verify the DEM-S28X01Q-SR against D-Link's transceiver compatibility matrix for the target switch model before specifying the part. The EdgeOptic compatible is built to the SFP28 MSA (SFF-8402 mechanical and high-speed electrical, SFF-8432 management interface, SFF-8472 diagnostics) so any DQS-series chassis with 25G SFP28 cages reads the module through the standard interface.

On FEC, 25G FEC mode is configured at the MAC layer on each link partner and the optical path is agnostic to whether RS-FEC or BASE-R FEC is negotiated on the host. The DQS-series switch FEC configuration determines the negotiated mode on the link; confirm the FEC profile on both link partners during commissioning to avoid mismatch on mixed-vendor 25G aggregation. The module is symmetrically compatible with either FEC mode supported on the host port.

Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. Ships next business day from EU stock with a lifetime warranty. For DQS-series data-center rollouts where DEM-S28X01Q-SR is the catalog SKU, multi-site volume pricing on a 25G aggregation deployment, or compatibility verification against a specific D-Link switch firmware build, contact our sales team.