Cisco GLC-LH-SMD Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 1000BASE-LX/LH SFP Transceiver Module for MMF/SMF, 1310nm, DOM Support, Extended Temperature
SKU:GLC-LH-SMD
Naming Breakdown
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GLC: Gigabit Ethernet Small Form-Factor Pluggable Transceiver
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LH: Long Haul / LX long wavelength Gigabit optical specification
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S: SFP Form Factor
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M: Multi-fiber type support(MMF+SMF)
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D: Digital Diagnostic Monitoring (DOM/DDM) Supported
Core Product Positioning
The Cisco GLC-LH-SMD is a hot‑swappable SFP optical transceiver compliant with IEEE 802.3z 1000BASE‑LX/LH. Operating at 1310 nm, it supports both single-mode fiber and multi-mode fiber. It enables Gigabit Ethernet uplinks for inter-building campus connections, aggregation backbone links and remote site interconnections. Equipped with DOM/DDM, it supports real-time monitoring of optical operating parameters. When deployed over multi-mode fiber, a mode conditioning patch cord is required to avoid modal dispersion.
2. Hardware & Software Compatibility
Supported Host Platforms
Cisco Catalyst 2960, 3560, 3650, 3750, 3850, 4500, 6500, 6800, 9200, 9300; IE Industrial Switches; ISR 1100/4000 Series; ASR 1000; Wireless Controllers; Firepower appliances with SFP slots.
Supported IOS / IOS XE Versions
All mainstream Cisco IOS and IOS XE releases supporting SFP and DOM functionality.
Supported Fiber Types
Single‑Mode Fiber(OS1/OS2,9/125μm), Multi‑Mode Fiber(OM1/OM2,50/62.5μm)
Unsupported Platforms
GBIC-only slots, SFP+/SFP28/QSFP ports without adapters, MDS storage switches.
3. Physical & Optical Performance Specifications
Form Factor
Hot‑swappable SFP (mini‑GBIC) compliant with SFP MSA & SFF‑8472(DOM)
Optical Interface
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Nominal Wavelength: 1310 nm (FP Laser)
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Connector: Duplex LC
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Data Rate: 1.25 Gbps wire‑speed Gigabit Ethernet
Maximum Transmission Reach
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OM1/OM2 Multi‑Mode Fiber: 550 meters (Mode conditioning cable required)
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OS1/OS2 Single‑Mode Fiber: Up to 10 km
Optical Power Budget
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Transmit Power: -9.5 dBm ~ -3 dBm
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Receiver Sensitivity: Minimum -20 dBm
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Maximum Receiver Input Power: -3 dBm
Digital Diagnostics
DOM / DDM (Digital Diagnostic Monitoring) Supported
Monitors module temperature, supply voltage, laser bias current, transmit optical power, receive optical power.
Environmental Operating Parameters (Extended Temperature)
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Operating Temperature:-5°C ~ +85°C (23°F ~ 185°F)
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Storage Temperature: -40°C ~ +85°C (-40°F ~ 185°F)
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Relative Humidity: 10% – 90%, 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 transmission, full‑duplex operation, 8b/10b encoding
Layer 2 Protocol Support
802.1Q VLAN trunking, 802.3x pause frame flow control, LACP, STP/RSTP/MSTP, EtherChannel aggregation
Interface Diagnostics
Link status detection, packet error counters, DOM real-time optical telemetry, local loopback testing
High Availability
OIR hot‑swap capability on supported Catalyst 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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Inter-building campus backbone fiber links over single-mode fiber infrastructure
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Gigabit uplinks between aggregation switches and core switches within data centers
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Hybrid network deployments utilizing both multi-mode and single-mode fiber
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Remote enterprise site interconnections within 10 km distance range
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Spare replacement transceiver for SFP‑based Cisco enterprise switching environments
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, VCCI Class A
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Laser Safety: Class 1 Laser Product per IEC 60825‑1
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Standards: IEEE 802.3z, 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-LH-SMD 1000BASE‑LX/LH SFP Optical Transceiver
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Hardware installation guide
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Safety and regulatory documentation
Note: Duplex LC fiber patch cables and mode conditioning cables are sold separately.
End-of-Sale Status
Cisco GLC-LH-SMD remains active and available for new orders.
Difference reminder: GLC-LH-SM = No DOM, Commercial Temperature;GLC-LH-SMD = DOM/DDM + Extended Temperature Range.
UNSPSC Classification Code
43222618 – Cisco GLC-LH-SMD 1000BASE-LX/LH SFP optical transceiver with DOM, hot‑swappable Gigabit multi/single-mode fiber module for Cisco enterprise switches and routers.
Hardware Warranty
Original Cisco units carry Cisco limited hardware warranty; refurbished units follow reseller warranty terms.
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