• Juniper Networks  Compatible 1.25G 20km SC BiDi SFP Module front white background view
  • Single SC simplex port bidi sfp module 1.25G 20km gigabit bidirectional SFP for Juniper switch
  • hytoptodevice 1310nm TX 1550nm RX  20km SC bidi sfp transceiver with DDM digital diagnostic monitoring metal housing
  • HYTOPTODEVICE bidi sfp module compatible juniper SFP-1GBX-20U-SC-JU
  • Juniper Networks  Compatible 1.25G 20km SC BiDi SFP Module front white background view
  • Single SC simplex port bidi sfp module 1.25G 20km gigabit bidirectional SFP for Juniper switch
  • hytoptodevice 1310nm TX 1550nm RX  20km SC bidi sfp transceiver with DDM digital diagnostic monitoring metal housing
  • HYTOPTODEVICE bidi sfp module compatible juniper SFP-1GBX-20U-SC-JU

Juniper Compatible SFP-1GBX-20U-SC-JU | 1.25G 20km SC BiDi SFP Transceiver Tx1310 Rx1550 | HYTOPTODEVICE

Factory wholesale Juniper SFP-1GBX-20U-SC-JU equivalent BiDi SFP Transceiver, 1.25G single fiber 20km simplex SC port, DDM DOM & hot-swap supported. Fully interoperable with Juniper switches, free EEPROM programming for bulk orders, RoHS & CE certified single fiber bidirectional gigabit optical module.
NO. Brand  Compatible P/N Remarks
1 Cisco SFP-1GBX-U-SC-CO 
2 Dell 407-10588
3 Brocade SFP-1GBX-U-SC-BR
4 Juniper Networks  SFP-1GBX-20U-SC-JU
5 Extreme Networks SFP-1GBX-U-SC-EX
Description
Juniper Compatible SFP-1GBX-20U-SC-JU BiDi SFP Transceiver | 1.25G 20km SC (Tx1310nm/Rx1550nm)

Product Overview
The BiDi SFP Transceiver serves as a direct pin-to-pin replacement for Juniper OEM SFP-1GBX-20U-SC-JU, delivering stable 1.25Gbps single-fiber bidirectional transmission up to 20km over standard 9/125μm single-mode fiber. Designed with simplex SC port and Tx1310nm transmit / Rx1550nm receive wavelength configuration, this bidirectional optical hardware cuts fiber core consumption in half, bringing remarkable cost savings for enterprise campus networking, FTTx broadband access and long-distance IP camera monitoring systems.

Fully compliant with SFP MSA SFF-8431/SFF-8472 and IEEE 802.3z global standards, this Juniper compatible BiDi SFP Transceiver supports real-time DDM/DOM digital diagnostic monitoring and safe hot-swap operation. Every finished unit passes 24-hour continuous aging testing to guarantee consistent error-free gigabit performance for long-term commercial rack deployment.

Key Technical Specifications

This table lists factory-calibrated optical and electrical parameters fully matching the original Juniper SFP-1GBX-20U-SC-JU reference standards, suitable for enterprise and telecom single-fiber bidirectional networking projects.
Juniper  Compatible  SFP-1GBX-20U-SC-JU Vendor Name HYTOPTODEVICE
Form Factor SFP Max Data Rate 1.25Gbps
Wavelength TX1310nm/RX1550nm Max Distance 20km 
Connector Simplex SC Transmitter Type 1310nm FP
Cable Type SMF Receiver Type PIN
TX Power -9.0~0dBm Receiver Sensitivity < -23.0dBm
Protocols SFF-8472 MSA Compliant, IEEE 802.3ah-2004 Operation Temperature 0 to 70°C (32 to 158°F)

Usage Guidelines & Operational Practices

Follow these standardized operation rules to extend service life and maintain stable link performance of your BiDi SFP Transceiver:

  1. Complementary Pairing Requirement All bidirectional optical transceivers must be deployed in matched wavelength pairs. This Tx1310/Rx1550 BiDi SFP Transceiver requires a counterparty Tx1550/Rx1310 transceiver at the opposite fiber end; mismatched wavelength pairs cannot establish valid fiber links.
  2. Fiber Type Restriction Only use standard 9/125μm single-mode fiber (SMF) with SC/UPC patch cords. This transceiver cannot work normally on multi-mode fiber (MMF), which will cause severe signal attenuation and persistent random bit errors.
  3. Distance & Attenuation Control Optimized for 20km long-range links. For lab testing or field deployment under 5km, install an optical attenuator to avoid receiver overload and permanent chip damage.
  4. Optical Port Dust Protection SC ports and fiber end faces are sensitive to dust and fingerprints. Keep dust caps attached to idle module ports and unused fiber connectors.
  5. Hot-Plugging Operation This MSA-compliant BiDi SFP Transceiver supports safe hot swap. Leave several seconds of interval between module removal and reinsertion to allow the network operating system to complete full hardware recognition and avoid unexpected link flapping.

Full Compatibility List and Supported Devices

1. Native Juniper Networks Platform Compatibility

This plug-and-play BiDi SFP Transceiver delivers full native interoperability with all Juniper network switches, routers and firewalls equipped with standard SFP slots. No manual CLI tuning or system adjustments are required, and no unauthorized transceiver error alerts will pop up on Junos OS. Fully compatible Juniper device series:

  • Juniper EX Series Switches: EX2200, EX3300, EX3400, EX4200, EX4300, EX4550
  • Juniper QFX Series Switches: QFX5100, QFX5120, QFX5200, QFX5210
  • Juniper MX Series Routers: MX80, MX104, MX240, MX480, MX960
  • Juniper SRX Series Firewalls: SRX300, SRX340, SRX345, SRX380, SRX550
  • Juniper SFP-port single fiber media converters

2. Multi-Brand Cross Compatibility

This universal BiDi SFP Transceiver supports cross-brand mixed-vendor network deployment, divided into two hardware compatibility categories:

  1. Open-Brand Compatibility Works plug-and-play without custom coding for MSA standard open gear: MikroTik, TP-Link, D-Link, Fortinet, Zyxel gigabit switches & routers.
  2. Locked-Brand Compatibility Adaptable to locked enterprise hardware including Cisco, Arista, HPE, Huawei, H3C, Juniper, Dell, Custom EEPROM programming eliminates system recognition warnings.

3. Free Custom EEPROM & Bulk OEM Service

We provide free EEPROM firmware rewrite and basic bulk OEM labeling services for all batch orders of this BiDi SFP Transceiver. Preload matched vendor ID data to remove transceiver error prompts; customized packaging is available for large-scale project deployment with zero hidden service or tool fees.

Primary Application Scenarios

As an economical single-fiber bidirectional networking solution, the 1.25G 20km SC BiDi SFP Transceiver fits all network projects facing limited fiber core resources:

  • Juniper enterprise campus cross-building gigabit interconnection & network renovation
  • FTTB/FTTH single fiber broadband access aggregation
  • IP camera long-distance fiber monitoring for factories, parks and communities
  • Hospital, campus and industrial private communication backbone
  • Data center low-speed gigabit aggregation structured cabling
  • Network expansion projects with insufficient existing fiber pipelines


Connectivity Solutions (Applications)

1. 1G Link for Switch to Switch
Deploy paired BiDi SFP Transceiver to build stable 20km single-fiber gigabit links between core and access Brocade switches. This solution halves fiber consumption, maintains low-latency forwarding and supports cross-building enterprise interconnection.
Juniper compatible BiDi SFP Module 1.25G 20km switch to switch single fiber gigabit networking solution

2. 1G Link for Switch to Media Converter

Pair this Juniper-compatible BiDi SFP Transceiver with single-fiber media converters to extend remote network coverage. Ideal for branch offices and off-site monitoring points, delivering loss-free gigabit transmission over 20km SMF.
1.25G 20km SC BiDi SFP Module Juniper switch to media converter long distance transmission diagram

3. 1G Link for Structured Cabling

This SC-type BiDi SFP Transceiver simplifies building integrated cabling layouts and cuts pipeline costs. It delivers scalable, reliable bidirectional gigabit links for unified multi-building network infrastructure.
SC simplex BiDi SFP transceiver multi-building enterprise structured cabling gigabit network layout

Core Product Features

1. Increasing Utilization of Existing Fiber
Traditional dual-fiber optical transceivers consume two fiber cores for bidirectional traffic transmission, while this BiDi SFP Transceiver integrates WDM wavelength multiplexing technology to send and receive data over only one single fiber strand. It fully leverages unused existing fiber resources and avoids redundant cabling during network expansion projects.
Single fiber BiDi SFP Transceiver maximize idle fiber resource utilization for enterprise network upgrade

2. Double Your Network Capacity

By enabling bidirectional data transmission on a single fiber strand, this professional BiDi SFP Transceiver effectively doubles the carrying capacity of original fiber links without laying new fiber cables. It provides a low-cost, high-efficiency bandwidth expansion solution for Juniper enterprise network upgrades and operator FTTx access network optimization.
20km SC BiDi SFP transceiver double network bandwidth without extra fiber deployment chart

3. Stable 1G Connectivity: The Groundwork for High-Availability Data Centers

In an era where data centers are scaling to 100G, 400G, and beyond, the stability of your underlying 1G infrastructure remains the true backbone of operational continuity. Our enterprise-grade BiDi SFP Transceiver 1G connectivity solutions are engineered to deliver rock-solid, low-latency performance where reliability matters most.
From critical Out-of-Band (OOB) management to real-time environment monitoring, we ensure your control plane is always online, always stable, and completely isolated from production traffic spikes.

4. Tested in The Host Device to Prove Interoperability

Every production batch of this BiDi SFP Transceiver undergoes full real-machine compatibility testing on Juniper, Huawei, H3C and other mainstream network hardware. We verify link handshake stability, DDM monitoring precision and hot-swap performance under real network load, eliminating all on-site deployment compatibility risks.
Multi-brand compatible BiDi SFP transceiver real Juniper switch host tested interoperability verification

5. Comprehensive Factory Testing for Stable Performance

Each BiDi SFP Transceiver passes strict standardized quality control tests, including high/low temperature aging cycles, repeated plug-pull durability inspection, optical power consistency calibration and 72-hour continuous operation testing. Rigorous mass production QC ensures consistent batch performance and extended service life for all commercial network deployments.
Juniper SFP-1GBX-U-SC-BR equivalent BiDi SFP transceiver standardized factory performance testing flow


FAQ

Q1: Is re-flashing EEPROM firmware complicated if we switch to another brand of network hardware later?
A1: Our team provides free EEPROM rewrite support for all BiDi SFP Transceiver orders. The whole reprogramming process is finished in our factory before delivery, no complicated professional tools or on-site technical operations needed when you migrate to new hardware brands.

Q2: Can this BiDi SFP Transceiver deliver stable auto-negotiation for mixed speed and duplex mode network connections?
A2: Fully compliant with IEEE auto-negotiation standards, this transceiver automatically matches correct transmission speed and duplex modes with connected switches or media converters, eliminating handshake failures during mixed-device networking.

Q3: Will inferior internal chip hardware lead to obvious signal jitter and added transmission latency on live business links?
A3: We adopt top-grade imported laser and receiver chips for every BiDi SFP Transceiver. Strict pre-delivery signal testing controls jitter and latency within standard industrial ranges to keep smooth low-delay gigabit data forwarding under full traffic loads.

Q4: Can the built-in 1310nm and 1550nm laser components keep steady optical power after years of non-stop 24/7 rack operation?
A4: Each BiDi SFP Transceiver undergoes long-duration aging testing to verify laser power consistency. Stable laser structures and built-in temperature compensation circuits slow down optical attenuation, maintaining consistent output power for multi-year continuous running.

Q5: Will this transceiver suffer overheating damage when deployed in compact, low-airflow dense switch racks?
A5: Full metal heat dissipation housing and built-in thermal protection circuits effectively lower internal operating temperature. The BiDi SFP Transceiver automatically adjusts laser output to avoid overheating burnout in tightly packed poorly ventilated cabinet environments.

Q6: How to avoid field installers mismatching Tx1310 and Tx1550 paired transceivers during on-site fiber wiring?
A6: Clear wavelength identification labels are printed on every BiDi SFP Transceiver housing with distinct visual marks for the two paired wavelength variants. Field staff can quickly distinguish matching pairs to prevent link failure caused by wrong combination.

Q7: Are strict high MOQ restrictions blocking small-batch procurement for incremental enterprise network upgrade projects?
A7: We support flexible order quantities for this mainstream BiDi SFP Transceiver without rigid high minimum order limits. Small test lots and tiny batches for partial network expansion are all available with consistent factory unit pricing.

Q8: Does the product packaging offer enough shock and dust resistance to safeguard fragile optical chips during long international shipping?
A8: Every BiDi SFP Transceiver is individually packed with anti-static shockproof boxes and SC dust caps. Thick outer cartons with buffer materials prevent collision and contamination damage during cross-border long-distance logistics transportation.

Q9: Can this BiDi SFP Transceiver provide complete official RoHS, CE and FCC certification files to meet enterprise environmental safety audit standards?
A9: All our manufactured BiDi SFP Transceiver fully pass RoHS hazardous substance inspection, CE EMC and FCC safety tests. Complete official certification documents can be supplied on request for bidding, customs clearance and internal compliance audits.

Q10: Will this BiDi SFP Transceiver exceed standard power draw limits and put extra load on the switch’s total power budget?
A10: The transceiver is designed with low-power optical circuits and strictly controlled power consumption within MSA standard limits. It will not exceed the power threshold of standard SFP slots or create extra power pressure on Juniper and other brand switches.

Why Network Engineers Choose HYTOPTODEVICE

HYTOPTODEVICE has supplied over 5000,000 optical transceiver modules to data centers, ISPs, and enterprise networks across 100+ countries since 2011. Every module undergoes a 72-hour burn-in test and full DDM/DOM validation before shipment.

  • 100% hardware-tested compatibility with Cisco, Huawei,Dell,Juniper, and Arista
  • ISO 9001:2015 certified manufacturing facility in Shenzhen
  • Full product range coverage:1.25G/10G/25G/40G/100G/200G/400G/800G/1.6T
  • In-stock supply & fast global shipping, average lead time of 3–5 business days with DHL/FedEx express options
  • Dedicated pre-sales engineering support for custom configurations
  • Actual hardware,actual switches,actual results.we publish compatibility test video,eliminate compatibility anxiety. you can watch before you buy. 
  • We can provide inspection and shipping videos to make you feel as if you are right here with the product.
  • Private Label support - EEPROM / firmware customization support

“Phenomenal performance. We deployed 200 HYTOPTODEVICE SFP modules to replace Cisco OEMs in our backbone network. Result? Zero compatibility issues and a 60% reduction in costs. Highly recommended for mission-critical networks."— Senior Network Engineer, Regional Telecom, Australia

Quality Certification & Compliance

 At HYTOPTODEVICE, our quality commitment is backed by industry-standard validations. From fiber optical transceiver manufacturing to final visual inspection, from IQC、IPQC、FQC to OQC, our processes ensure global compliance and reliability.

We adhere to rigorous standards for our SFP modules and network solutions:

  • ISO 9001: Certified quality management and production consistency.

  • CE & FCC: Fully compliant for seamless Global Market Access.

  • RoHS: Committed to environmental responsibility and hazardous material control.

  • Proven Reliability: Rigorous testing to reduce compliance risk and ensure safety.

Certified Quality. Global Standards. Guaranteed Performance.




Rigorous Industrial Product Testing

   

100% 3rd Party Compatible

Partial Test Demonstration

Others

 


  • Juniper Networks  Compatible 1.25G 20km SC BiDi SFP Module front white background view
  • Single SC simplex port bidi sfp module 1.25G 20km gigabit bidirectional SFP for Juniper switch
  • hytoptodevice 1310nm TX 1550nm RX  20km SC bidi sfp transceiver with DDM digital diagnostic monitoring metal housing
  • HYTOPTODEVICE bidi sfp module compatible juniper SFP-1GBX-20U-SC-JU

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