Cisco Compatible GLC-BX-U-1310D-40 / GLC-BX-D-1490D-40 BiDi SFP Transceiver | 1GBASE-BX, 1310/1490nm, LC Simplex, SMF (40km)
Product Overview
The Cisco Compatible GLC-BX-U-1310D-40 and GLC-BX-D-1490D-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 1490nm wavelengths, enabling full-duplex communication over a single fiber strand.
This solution is ideal for long-reach access networks, metro aggregation, and enterprise backbone extensions, especially in environments where fiber resources are limited and cost efficiency is critical.
Fully compatible with Cisco platforms, these modules provide a reliable, scalable, and cost-effective alternative to OEM optics.
Wavelength Configuration & Pairing
✔ Correct Pairing:
1310/1490 ↔ 1490/1310 → Full-duplex over single fiber
Key Features
- Supports 1Gbps data rate (1000BASE-BX)
- BiDi single-fiber transmission via WDM technology
- TX/RX wavelengths: 1310nm / 1490nm
- Up to 40km transmission over SMF
- Hot-pluggable SFP form factor
- Fully compatible with Cisco SFP ports
- Reduces fiber usage by 50%
- Optimized for long-distance transmission
- MSA compliant and fully tested
Technical Specifications
General Parameters
- Transmission Distance: Up to 40km
- Fiber Type: Single-Mode Fiber (SMF)
Optical Characteristics
- Transmitter Type: DFB Laser
- Receiver Type: PIN Photodiode (or APD depending on design)
- 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)
Applications
- FTTx long-reach access networks
- Metro aggregation networks
- Enterprise campus interconnection
- ISP and telecom deployments
- Fiber-limited long-distance environments
1310/1490 BiDi – Why It Works for 40km
Compared to shorter-distance BiDi modules, this 40km version:
- Uses higher optical power budget
- Provides enhanced receiver sensitivity
- Maintains stable performance over longer fiber spans
This makes it suitable for extended reach without upgrading to higher-speed optics.
Pairing Note (Critical)
BiDi modules must be deployed in complementary pairs:
✔ 1310/1490 ↔ 1490/1310 → ✅ Works
❌ Same wavelength modules → ❌ No link
Why Choose This Product
The Cisco-compatible GLC-BX-U-1310D-40 / GLC-BX-D-1490D-40 modules offer:
- Long-distance transmission up to 40km
- Reduced fiber infrastructure cost (single fiber)
- Reliable performance for access and aggregation networks
- Seamless compatibility with Cisco equipment
They are ideal for deployments where distance, cost efficiency, and fiber optimization are all critical factors.
When to Choose This Module
Choose this 40km BiDi series if:
✔ Distance requirement is between 20–40km
✔ Fiber resources are limited
✔ Need long-distance stable 1G connectivity
✔ Want to avoid higher-cost solutions (e.g., 10G upgrade)
Choose 20km BiDi modules if:
✔ Distance is shorter
✔ Lower cost is preferred
Cisco compatible GLC-BX-U-1310D-40, GLC-BX-D-1490D-40, 1G BiDi SFP 40km, 1310/1490 SFP, 1000BASE-BX long distance, single fiber SFP Cisco
