| NO. | Brand | Compatible P/N | Transceiver Type |
| 1 | Cisco | GLC-BX120-U | SFP-G54-1BLD |
| 2 | Juniper | SFP-GE120KT14R15 | SFP-G34-10LD |
| 3 | Brocade | E1MG-1G-BXU-120 | SFP-G34-20LD |
| 4 | Dell | SFP-GE-BX120U-1490 | SFP-G35-20LD |
| 5 | Extreme | MGBIC-BX120-U | SFP-G34-40LD |
| 6 | H3C | SFP-GE-120-SM1490-A | SFP-G35-40LD |
| 7 | HPE H3C | SFP-1G-BXU-120 | SFP-G45-80LD |
| 8 | Netgear | SFP-GE-BX120-U |
| Cisco Compatible | GLC-BX120-U | Vendor Name | HYTOPTODEVICE |
| Form Factor | SFP | Max Data Rate | 1.25Gbps |
| Wavelength | TX1490nm/RX1550nm | Max Distance | 120km |
| Connector | Simplex LC | Transmitter Type | 1490nm DFB |
| Cable Type | SMF | Receiver Type | APD |
| TX Power | 1~5dBm | Receiver Sensitivity | < -32.0dBm |
| Protocols | SFF-8472 MSA Compliant, IEEE 802.3ah-2004 | Operation Temperature | 0 to 70°C (32 to 158°F) |
Complementary Pairing: BiDi transceivers must be deployed in matched pairs (e.g., TX1490/RX1550 with TX1550/RX1490). Mismatched wavelengths cannot establish a link.
Fiber Choice: Use Single-Mode Fiber (SMF) only. Do NOT use MMF.
Connector Match: Simplex LC (UPC/PC polish only). Do NOT use Duplex LC or APC.
Laser Safety: Class 1 Laser. Never look directly into optical ports or fiber end-faces.
ESD Safety: Wear an anti-static wrist strap before handling the transceiver.
Cleanliness & Dust: Keep dust caps installed on all unused ports. Clean fiber connectors with an optical cleaning pen before insertion; dust causes over 80% of link failures.
Optical Attenuator Required: For short-distance testing or links (<20 km), connect a 10dB–15dB attenuator to the RX port to prevent receiver damage.
Installation & Hot-Swap: MSA compliant. Insert and remove gently without powering down the device.
High Loss / Packet Drops: Ensure fiber bend radius exceeds 30 mm, inspect optical power levels, and clean connectors.
No Link: Verify complementary BIDI wavelength pairing requirement; clean Simplex LC end-faces; check port speed configuration.
1. Supported Hardware & Firmware
Q1: Can the SFP BIDI MODULE sourced from our manufacturer be deployed with many models of gigabit SFP media converters for metro network projects? A: Yes, this HYTOPTODEVICE BiDi SFP transceiver is compatible with most gigabit SFP media converters. It requires the media converter to support 1000BASE-BX-U single fiber BiDi, otherwise link handshake will fail.
Q2: When placing bulk wholesale orders for SFP BIDI MODULE, should buyers purchase two matched BiDi transceivers to build single-fiber point-to-point long-distance links? A: Yes, purchasing matched pairs is mandatory for BiDi fiber links. This Tx1490/Rx1550 transceiver must pair with a Tx1550/Rx1490 HYTOPTODEVICE BiDi module; one single optic cannot achieve bidirectional communication on a single fiber strand.
Q3: When designing multi-vendor metro network systems, can this custom SFP BIDI MODULE interoperate with BiDi optics from other optical hardware manufacturers? A: Yes, cross-brand pairing is technically achievable if both modules follow MSA 1000BASE-BX-U specs. Verify complementary wavelengths and 1.25G speed before bulk deployment, as minor firmware differences may cause unstable links.
Q4: For network procurement teams sourcing optical parts, can this 120km BiDi optic reach its full rated transmission distance during field metro installation? A: Yes, this HYTOPTODEVICE BiDi SFP supports up to 120km maximum reach under ideal OS1/OS2 single mode fiber. Real world splices, patch panels and connectors add optical loss, so calculate total link budget before site installation.
Q5: Can engineering teams test bulk wholesale SFP BIDI MODULE using short fiber patch cables inside a laboratory test environment? A: Yes, short-range lab testing is allowed for this BiDi transceiver. Install a suitable inline optical attenuator to reduce excess transmit power, otherwise the APD receiver will overload and suffer permanent damage.
Q6: What network performance impact will occur when deployed fiber length exceeds the 120km rating of this SFP BIDI MODULE? A: Yes, link performance will degrade when fiber length goes over the rated 120km limit. Extra chromatic dispersion and optical loss trigger packet loss or LOS alarms; keep link length within 120km for stable operation.
Q7: What optical receiver component is integrated inside this 120km long-haul BiDi SFP supplied by our manufacturer? A: This HYTOPTODEVICE 120km BiDi SFP adopts APD photodiode receiver. The APD receiver delivers high sensitivity for long-distance 1000BASE-BX-U signals, but it is sensitive to high incoming optical power on short fiber runs.
Q8: Will DDM monitoring trigger warning notifications on this custom SFP BIDI MODULE when fiber signal attenuation rises beyond acceptable thresholds? A: Yes, built-in DDM DOM monitoring will trigger alarms when signal attenuation exceeds threshold. HYTOPTODEVICE transceivers continuously track Rx optical power, helping field technicians quickly identify fiber and connection faults.
Q9: Does DDM optical monitoring function normally if this bulk wholesale SFP BIDI MODULE is installed on gigabit network hardware of different vendors? A: Yes, DDM follows SFF-8472 standard and works on most MSA-compliant network hardware. Some switch vendors restrict DDM readouts for third-party transceivers even though the HYTOPTODEVICE optic’s monitoring hardware works normally.
Q10: Should procurement teams order LC dust caps to protect the optical port once this SFP BIDI MODULE is removed from Cisco switch slots? A: Yes, LC dust caps are required to protect the transceiver optical port after removal. Dust and oil contamination on the facet increases signal reflection and loss, shortening the service life of your HYTOPTODEVICE BiDi module.
Q11: What long-haul fiber infrastructure projects require this 1.25G 120km single-strand SFP BIDI MODULE sourced from our supplier? A: This HYTOPTODEVICE BiDi transceiver is ideal for single strand long-distance fiber projects. Common use cases include metro inter-building links, remote branch backhaul, long-range IP camera uplink and dark fiber service deployment.
Q12: Can this 1.25G BiDi transceiver be deployed inside CPRI telecom cellular tower sites? A: Yes, as long as line rates match 1.25Gbps protocols and ambient temperature requirements (industrial grade recommended) are met. This HYTOPTODEVICE BiDi SFP can work for applicable 1.25G CPRI links, but verify tower site temperature range and hardware compatibility before field rollout.
Q13: Will purchasing third-party compatible SFP BIDI MODULE from our manufacturer void the original Cisco switch hardware warranty? A: No, using HYTOPTODEVICE compatible SFP optics will not void your switch warranty in most scenarios. Always check the network vendor’s official warranty policy; a small number of proprietary platforms have special restrictions.
Q14: Can HYTOPTODEVICE manufacturer deliver custom EEPROM programming for bulk SFP BIDI MODULE orders targeting legacy Cisco network equipment? A: Yes, HYTOPTODEVICE provides custom EEPROM programming service for bulk orders. Submit the exact network hardware model, firmware version and OEM part number for pre-sales verification before mass production.
Q15: Can bulk network buyers get discounted factory pricing for large metro network rollout when ordering bulk wholesale SFP BIDI MODULE? A: Yes, volume discounts are available for bulk & wholesale orders of HYTOPTODEVICE SFP BiDi transceivers. Send your project quantity, delivery schedule and requirements to our sales team for a formal quotation.
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.
“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.
