Cisco Compatible GLC-BX-U-1310D-40 / BX-D-1550D-40 | 1G BiDi SFP 1310/1550nm 40km
Cisco Compatible Transceivers

Cisco Compatible GLC-BX-U-1310D-40 / BX-D-1550D-40 | 1G BiDi SFP 1310/1550nm 40km

Buy Cisco compatible GLC-BX-U-1310D-40 and GLC-BX-D-1550D-40 BiDi SFP modules. 1G single-fiber 1310/1550nm up to 40km. Reliable and cost-effective.

Cisco Compatible GLC-BX-U-1310D-40 / GLC-BX-D-1550D-40 BiDi SFP Transceiver | 1GBASE-BX, 1310/1550nm, LC Simplex, SMF (40km)

Product Overview

The Cisco Compatible GLC-BX-U-1310D-40 and GLC-BX-D-1550D-40 BiDi SFP Transceivers are high-performance 1Gbps single-fiber optical modules designed for long-distance bidirectional transmission up to 40 kilometers over single-mode fiber (SMF). Utilizing advanced Wavelength Division Multiplexing (WDM) technology, they operate on 1310nm and 1550nm wavelengths, enabling full-duplex communication over a single fiber strand.
Compared to standard 1310/1490nm solutions, the 1310/1550nm wavelength combination offers lower attenuation and improved link margin, making it especially suitable for longer or higher-loss fiber links.
Fully compatible with Cisco platforms, these modules provide a reliable, flexible, and cost-effective alternative to OEM optics.


Wavelength Configuration & Pairing

Model
TX
RX
Type
GLC-BX-U-1310D-40
1310nm
1550nm
BX-U
GLC-BX-D-1550D-40
1550nm
1310nm
BX-D
✔ Correct Pairing: 1310/1550 ↔ 1550/1310 → Full-duplex communication over single fiber


Key Features

  • Supports 1Gbps data rate (1000BASE-BX)
  • Single-fiber (BiDi) transmission via WDM technology
  • TX/RX wavelengths: 1310nm / 1550nm
  • Up to 40km transmission over SMF
  • LC simplex connector
  • Hot-pluggable SFP form factor
  • Fully compatible with Cisco SFP ports
  • Reduces fiber usage by 50%
  • Lower attenuation at 1550nm for improved long-distance performance
  • MSA compliant and fully tested


Technical Specifications

General Parameters
  • Form Factor: SFP
  • Data Rate: 1Gbps
  • Transmission Distance: Up to 40km
  • Connector: LC Simplex
  • Fiber Type: Single-Mode Fiber (SMF)
Optical Characteristics
  • Transmitter Type: DFB Laser
  • Receiver Type: PIN or APD Photodiode
  • TX Power: -3 ~ +2 dBm
  • RX Sensitivity: ≤ -24 dBm
Electrical & Environmental
  • Power Consumption: ≤ 1.2W
  • Operating Temperature: 0°C to 70°C
  • Storage Temperature: -40°C to 85°C
Compliance
  • IEEE 802.3ah (1000BASE-BX)
  • SFP MSA compliant
  • RoHS compliant


1310/1550 vs 1310/1490 – Why Choose 1550nm?

Parameter
1310 / 1490
1310 / 1550
Attenuation
Standard
Lower (1550nm advantage)
Link Margin
Moderate
Higher
Long-distance stability
Good
Better
Cost
Lower
Slightly higher
Recommendation: Choose 1310/1550nm BiDi modules for 40km links or higher-loss environments where additional optical margin is required.


Applications

  • Long-distance FTTx deployments
  • Metro aggregation and backbone networks
  • Enterprise inter-campus connectivity
  • ISP and telecom infrastructure
  • Fiber-limited long-reach environments


Pairing Note (Critical)

BiDi modules must always be used in complementary pairs:
✔ 1310/1550 ↔ 1550/1310 → ✅ Works
❌ Same wavelength modules → ❌ No link


Why Choose This Product

The Cisco-compatible GLC-BX-U-1310D-40 / GLC-BX-D-1550D-40 modules are optimized for long-distance and high-performance single-fiber networks. They offer:
  • Extended reach up to 40km
  • Improved optical performance with 1550nm wavelength
  • Reduced fiber infrastructure cost
  • Reliable and stable transmission
They are ideal for deployments where distance, performance, and fiber efficiency are all critical.


When to Choose This Module

Choose this 40km (1310/1550) BiDi series if:
✔ Distance requirement is up to 40km ✔ Fiber loss is higher or link quality is uncertain ✔ Need better optical margin ✔ Want to reduce fiber usage
Choose 1310/1490 modules if:
✔ Standard conditions with lower cost priority




Cisco compatible GLC-BX-U-1310D-40 1550nm, GLC-BX-D-1550D-40, 1G BiDi SFP 40km, 1310/1550 SFP, 1000BASE-BX long distance, single fiber SFP Cisco