10G BiDi SFP+ 20km Transceiver (Tx1330Rx1270): BIDI-10G-SFP-20B

The EdgeOptic BIDI-10G-SFP-20B is a multi-vendor 10G BiDi SFP+ single-fiber optical module built for long-reach 10 Gigabit Ethernet over single-mode fiber using bidirectional transmission. It operates with asymmetric wavelengths, transmitting at 1330nm and receiving at 1270nm, and supports data rates from 1.25 to 11.32 Gbps across multiple protocols. The module uses a DFB (Distributed Feedback) laser for transmission and a PIN photodiode with a WDM (Wavelength Division Multiplexing) filter to recover the received signal on the same fiber strand. A 9 dB link budget sets the reach limit. Over OS2 single-mode fiber the module covers up to 20 kilometers under typical conditions. Distance is an indicative figure used for identification; actual reach depends on the link budget against the measured attenuation of the installed cabling.

The BIDI-10G-SFP-20B is a hot-pluggable SFP+ transceiver with a simplex LC/UPC connector as the optical interface, running both transmit and receive over a single fiber strand. The electrical interface conforms to the SFF-8431 SFP+ MSA, so the module seats in standard SFP+ host ports across multiple vendor equipment platforms. It can be encoded with multiple vendor codes for recognition in different network equipment. DDM/DOM (Digital Diagnostic Monitoring) reports transmitted and received optical power, module temperature, bias current, and supply voltage through the MSA EEPROM interface, giving operators real-time visibility into transceiver health. The module runs across a 0 to 70 degrees C commercial temperature range on a +3.3V supply.

BiDi transceivers work only in matched pairs with complementary wavelength assignments. The BIDI-10G-SFP-20B (Tx1330/Rx1270) is the downstream direction and must sit opposite a BIDI-10G-SFP-20A (Tx1270/Rx1330) so each module transmits on the wavelength its partner receives. Two units of the same direction will not establish a link. The complementary BIDI-10G-SFP-20A is the second half of this 20km pair.

The module runs 10GBASE-BX20 single-fiber bidirectional operation per IEEE 802.3cp-2021 and the SFP+ MSA BiDi specification, and carries SDH/SONET STM-64 at 9.95 Gbps alongside 1 to 10G Fibre Channel rates. Optical parameters cover a TX power range of −5 to 0 dBm, RX sensitivity of −14.5 dBm, and an RX overload of +4 dBm. Multi-vendor interoperability comes from adherence to the SFP+ MSA; equipment with strict vendor module validation may need the matching vendor code programmed. The transceiver carries CE, RoHS, and Class 1 laser safety certification per IEC 60825-1.

Typical deployments include metropolitan area networks, campus backbone links with limited spare fiber, intermediate-distance point-to-point connections, fiber-to-the-business builds, and service provider access networks where conserving fiber strands cuts infrastructure cost. The multi-rate design carries legacy Gigabit Ethernet at 1.25 Gbps alongside native 10 Gigabit operation, which keeps mixed-speed network segments on a single part number.

Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms, the BIDI-10G-SFP-20B ships next business day from EU stock with a lifetime warranty. For volume pricing or help confirming the right wavelength direction for your link, contact our sales team.