Cisco GLC-BX-D-I Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 1000BASE-BX10-D Industrial Temperature Bi-Directional Single Fiber SFP Optical Transceiver Module with DOM Support
SKU:GLC-BX-D-I
Naming Breakdown
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GLC: Gigabit Small Form-Factor Pluggable Transceiver (SFP / mini-GBIC)
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BX: Bi-directional single-strand fiber WDM operation
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D: Downstream; Transmit 1490 nm / Receive 1310 nm
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I: Industrial temperature grade (-40°C ~ +85°C)
Core Product Positioning
The Cisco GLC-BX-D-I is a hot‑swappable industrial-grade BiDi SFP transceiver compliant with IEEE 802.3ah 1000BASE-BX10-D. It supports full-duplex Gigabit Ethernet transmission overone single strand of single-mode fiber (SMF)via wavelength division multiplexing. This modulemust be paired with complementary GLC-BX-U-I (1310nm-TX / 1490nm-RX)at the remote end. Designed for harsh operating environments, the industrial wide-temperature rating enables deployment in unconditioned outdoor cabinets, substations and transportation networks. Integrated DOM/DDM supports real-time optical performance monitoring.
2. Hardware & Software Compatibility
Supported Host Platforms
Cisco Catalyst IE2000, IE3300, IE3400, IE4000, IE9300 Industrial Rugged Switches; Catalyst 2960, 3650, 3850, 9200, 9300; ASR 901, ASR 903, ASR1000 Series Routers; Firepower appliances equipped with Gigabit SFP slots.
Supported IOS / IOS XE Versions
All mainstream Cisco IOS and IOS XE releases supporting SFP MSA specification and DOM diagnostic functions.
Supported Fiber Type
Single‑Mode Fiber (OS1 / OS2, G.652, 9/125μm) only; incompatible with multimode fiber.
Unsupported Platforms
SFP+/SFP28/QSFP ports without adapters, legacy GBIC-only interfaces, MDS storage switches.
Critical Note: Do not interconnect two GLC-BX-D-I modules. It requires matching GLC-BX-U-I for bidirectional communication.
3. Physical & Optical Performance Specifications
Form Factor
Hot‑swappable SFP (mini‑GBIC), compliant with SFP MSA & SFF‑8472 (DOM support)
Optical Interface
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Transmit Wavelength: 1490 nm
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Receive Wavelength: 1310 nm
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Connector: Simplex LC
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Data Rate: 1.25 Gbps wire-speed Gigabit Ethernet
Maximum Transmission Reach
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Standard OS1/OS2 Single-Mode Fiber: Up to10 km
Optical Power Budget
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Transmit Optical Power: -9 dBm ~ -3 dBm
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Receiver Sensitivity: Minimum -19.5 dBm
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Maximum Allowable Received Power: -3 dBm
Digital Diagnostics
DOM / DDM (Digital Diagnostic Monitoring) Supported
Monitors module temperature, supply voltage, laser bias current, transmit and receive optical power.
Environmental Operating Parameters (Industrial Grade)
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Operating Temperature:-40°C ~ +85°C (-40°F ~ 185°F)
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Storage Temperature: -40°C ~ +85°C (-40°F ~ 185°F)
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Relative Humidity: 5% – 95%, non‑condensing
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Maximum operating altitude: 3,000 meters
Typical Power Consumption
4. Supported Functional Capabilities
Ethernet Transport
Wire-speed Gigabit Ethernet full-duplex transmission, 8b/10b line coding
Layer 2 Protocol Support
802.1Q VLAN trunking, 802.3x pause frame flow control, LACP, STP/RSTP/MSTP, EtherChannel link aggregation
Interface Diagnostics
Link status detection, error counters, DOM real-time optical telemetry, local loopback testing
High Availability
OIR online insertion and removal on supported chassis; link redundancy via spanning tree or port channels
Operations & Management
IOS / IOS XE CLI, SSH, SNMP v2c/v3, Syslog logging, DOM optical parameter polling
5. Typical Deployment Scenarios
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Industrial automation and power substation single-fiber uplink connections
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Railway, highway roadside and remote unmanned site communication networks
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Mobile 4G/5G base station backhaul fiber links
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FTTx broadband access and enterprise metro Gigabit connections
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Network renovation projects to save single-mode fiber resources
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Spare replacement transceiver for Cisco industrial and enterprise switching/routing platforms
6. Regulatory & Compliance Certifications
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Safety Standards: UL 60950‑1, IEC/EN 60950‑1, CSA C22.2 No.60950‑1
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EMC Compliance: CE Mark, FCC Part 15 Class A, ICES‑003 Class A
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Laser Safety: Class 1 Laser Product per IEC 60825‑1
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Industry Standards: IEEE 802.3ah, SFP MSA, SFF‑8472
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Environmental: RoHS compliant, WEEE directive compliant
7. Standard Factory Package Contents
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Cisco GLC-BX-D-I 1000BASE‑BX10-D Industrial BiDi SFP Optical Transceiver
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Hardware installation guide
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Safety and regulatory documentation
Note: Simplex LC single-mode fiber patch cables are sold separately. Must deploy paired GLC-BX-U-I at the opposite terminal.
End-of-Sale Status
Cisco GLC-BX-D-I remains active and available for new orders.
Model Distinction Reference
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GLC-BX-D: Commercial grade, 0°C ~ +70°C
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GLC-BX-D-I: Industrial grade, -40°C ~ +85°C
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Pair partner:GLC-BX-U-I (1310nm-TX / 1490nm-RX)
UNSPSC Classification Code
43222618 – Cisco GLC-BX-D-I 1000BASE-BX10-D industrial BiDi single-strand single-mode SFP transceiver with DOM, hot‑swappable Gigabit optical module for Cisco industrial and enterprise switches and routers.
Hardware Warranty
Original Cisco units carry Cisco limited hardware warranty; refurbished units follow reseller warranty terms.
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