Description
Cost-Efficient Single-Fiber Gigabit Backhaul: Syrotech GOXS-BI3512-20D & GOXS-BI5312-20D Pair
Expand network reach while maximizing existing fiber capacity with the
Syrotech GOXS-BI3512-20D / GOXS-BI5312-20D 1.25G BiDi SFP modules, available through
Eliza Infotech. Engineered for Internet Service Providers (ISPs), local cable operators (LCOs), enterprise LANs, and IP surveillance networks, this complementary bidirectional optical pair enables reliable, full-duplex Gigabit Ethernet connectivity across
up to 20 kilometers over a single strand of optical fiber.
Key Features & Performance Highlights
1. 50% Fiber Core Savings with Bidirectional WDM
Traditional dual-fiber SFP transceivers require dedicated transmit (Tx) and receive (Rx) strands. By utilizing Wavelength Division Multiplexing (WDM), this BiDi SFP pair operates over one single strand of standard 9/125µm single-mode fiber (SMF), doubling available fiber core capacity without the heavy expense of laying new cables.
2. Color-Coded Complementary Pairing
Bidirectional communication requires opposite wavelengths at each end of the fiber run. Syrotech provides distinct color-coded bail latches for quick and error-free installation:
- GOXS-BI3512-20D (Blue Bail Latch): Transmits at 1310nm (FP Laser) and receives at 1550nm (PIN photodiode).
- GOXS-BI5312-20D (Yellow Bail Latch): Transmits at 1550nm (DFB Laser) and receives at 1310nm (PIN photodiode).
3. Robust 20-Kilometer Transmission Distance
Featuring precision-engineered laser transmitters and high-sensitivity optical receivers, these modules offer a dependable optical power budget designed to penetrate standard line loss, optical splices, and patch panels up to 20 km over 9/125µm SMF.
4. Digital Diagnostic Monitoring (DDM / DOM)
Compliant with SFF-8472 industry standards, the onboard DDM feature allows network administrators to monitor real-time operating metrics via switch CLI, Web GUI, or SNMP. Track optical transmit power, receive signal strength (RSSI), operating temperature, supply voltage, and laser bias to detect line degradation before links drop.
5. Universal MSA Compliance & Hot-Swappable Design
Manufactured to standard SFP Multi-Source Agreement (MSA) specifications, these modules install seamlessly into any standard Gigabit SFP port across leading equipment brands, including Syrotech, Cisco, MikroTik, D-Link, TP-Link, BDCOM, and Ubiquiti switches, media converters, and OLT uplinks.
Technical Specifications
| Model Numbers | GOXS-BI3512-20D (Tx1310/Rx1550) & GOXS-BI5312-20D (Tx1550/Rx1310) |
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| Brand | Syrotech Networks |
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| Form Factor | Standard SFP (Small Form-Factor Pluggable), Hot-Pluggable |
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| Data Rate | 1.25 Gbps / 1.063 Gbps (Gigabit Ethernet & 1G Fiber Channel) |
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| Optical Wavelengths | BI3512-20D: Tx: 1310nm (FP) / Rx: 1550nm
BI5312-20D: Tx: 1550nm (DFB) / Rx: 1310nm |
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| Transmission Distance | Up to 20 km over 9/125µm Single-Mode Fiber (SMF) |
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| Optical Connector | Simplex LC Receptacle |
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| Diagnostics | Digital Diagnostic Monitoring (DDM / DOM) supported (SFF-8472) |
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| Transmitter Power | -9 dBm to -3 dBm |
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| Receiver Sensitivity | ≤ -21 dBm |
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| Standard Compliance | IEEE 802.3z 1000BASE-BX, SFP MSA, RoHS, Class 1 Laser Eye Safety |
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| Power Supply | +3.3V Single Power Rail (Power Consumption < 1W) |
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| Operating Temperature | 0°C to +70°C (Commercial Grade) |
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Deployment Guidelines
- Complementary Pair Setup: Always install a BI3512-20D (Blue Latch) module on one side and a BI5312-20D (Yellow Latch) module on the opposite side of the single-fiber link.
- Connector Cleanliness: Always inspect and clean the Simplex LC patch cord ferrule before inserting it into the SFP transceiver optical receptacle to avoid optical power attenuation.
Purchase genuine Syrotech optical transceivers with full manufacturer warranty from Eliza Infotech — Panipat’s trusted wholesale partner for optical networking equipment, GPON OLTs, ONTs, and enterprise CCTV backhauls. Inquire for bulk contractor and ISP tier pricing.
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