The Cisco GLC-BX40-D-I is a 1000BASE-BX-D SFP module providing bi-directional Gigabit Ethernet connectivity over single-mode fiber for up to 40 km at 1490 nm transmit and 1310 nm receive.
The Cisco GLC-BX40-D-I offers high-speed bi-directional data transfer for Gigabit Ethernet networks using a single strand of single-mode fiber. It supports up to 1 Gbps throughput and a maximum reach of 40 km, operating with 1490 nm Tx and 1310 nm Rx wavelengths.
This module pairs with the GLC-BX40-U-I for duplex transmission over one fiber, reducing cabling costs and simplifying deployment. The built-in DOM functionality provides real-time optical power monitoring, helping ensure consistent performance and network stability.
Technical Specifications:
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Form Factor: SFP
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Data Rate: 1 Gbps
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Wavelength: Tx 1490 nm / Rx 1310 nm
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Connector Type: LC simplex
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Fiber Type: Single-Mode Fiber (SMF)
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Max Distance: 40 km
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Standard: 1000BASE-BX-D (IEEE 802.3ah)
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DOM Support: Yes
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Hot-Swappable: Yes
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Operating Temperature: -5°C to 85°C








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