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Marcus Delaney
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GLC-LH-SM delivered consistent 1000BASE-LX performance across single-mode fiber.
GLC-LH-SM
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Cisco 1000BASE-LX/LH SFP Transceiver Module, 10km SMF/550m M...
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Name:
GLC-LH-SM
- Description:
- Cisco 1000BASE-LX/LH SFP Transceiver Module, 10km SMF/550m MMF, Dual LC, 1310nm
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 746320609133
- Condition:
- Warranty:
- 3
- List Price:
$995.00
- Price:
$127.0087.2% off
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1
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GLC-LH-SM Overview
GLC-LH-SM uses the SFP form factor for hot-swappable placement in Gigabit Ethernet SFP ports on Cisco switches and routers. Line operation provides 1 Gbps Ethernet signaling through 1000BASE-LX/LH interfaces in access and aggregation slots across Cisco campus networks. Optical media is single-mode fiber for long spans and multimode fiber with mode-conditioning patch cords for shorter campus links. Dual LC/PC connectors provide separate transmit and receive paths through PC or UPC patch cords in the optical interface. Wavelength operation uses 1310 nm long-wavelength optics across the 1270 nm to 1355 nm transmit-and-receive window for bidirectional transmission. Maximum reach is 10 km on OS1/OS2 and 550 m on OM1/OM2 with Cisco mode-conditioning guidance. GLC-LH-SM carries the Commercial operating temperature class for standard Cisco Gigabit Ethernet SFP environments and supported legacy switch installations.
An FP transmitter launches long-wavelength optical output for IEEE 802.3z 1000BASE-LX operation across Cisco SFP host ports and routers. PIN receiver circuitry converts incoming optical input into electrical signaling for the SFP host interface and receive path. TX power delivers -9.5 dBm to -3 dBm average launch power across Cisco 1000BASE-LX/LH optical operating conditions. RX sensitivity reaches -20 dBm at the receive minimum input level for the long-wavelength optical budget. Receiver overload tolerates -3 dBm at the maximum receive input level before optical front-end saturation occurs. With 8b/10b encoding, 1000BASE-X framing carries Ethernet payloads across the serial optical lane and host interface. IEEE 802.3z and IEEE 802.3ah establish Gigabit Ethernet optical operation and compliance references for Cisco SFP modules. At 3.3V, the host electrical interface supplies the module through the standard SFP low-voltage rail. Power consumption stays at 1 W for GLC-LH-SM during Cisco 1000BASE-LX/LH optical operation across supported hosts.
Cisco Catalyst 2960, 3560, 3750, 3850, 4500, 4900, 6000, and 6800 platforms match deployment. Nexus 2000, 3000, 5000, 7000, and 9000 platforms also fit Cisco host deployment roles. Deployment environments span enterprise campus, data center aggregation, service provider edge, and router uplink refreshes. Required cable grade is OS2 for 10 km runs and OM2 with mode-conditioning patch cords for 550 m links. Legacy multimode cabling also serves shorter building links when mode conditioning aligns launch characteristics. Buy GLC-LH-SM from ORM Systems in new and certified refurbished condition for Cisco LX/LH deployments. Certified refurbished stock undergoes optical power validation, serial-number checks, cleaning, and receive-path inspection before sale. ORM Systems maintains replacement stock for supported Cisco families, legacy upgrades, emergency swaps, and advance spare-pool purchasing. Request a quote from ORM Systems for GLC-LH-SM volume orders, enterprise buyers, and bulk quotation support programs.
GLC-LH-SM price is $127.00, a 87.2% saving from the Cisco list price of $995.00. GLC-LH-SM is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for GLC-LH-SM for additional pricing. Browse the full Cisco Sfp Glc Module series or explore all Cisco products.
GLC-LH-SM Specifications
- Product Type
- Optical Transceiver
- Brand
- Cisco
- Series
- N/A
- Compatible OEM Part
- N/A
- Use Case
- Data Center / Enterprise Campus / Service Provider
- Form Factor
- SFP
- Data Rate
- 1 Gbps
- Protocol
- Ethernet
- Fiber Type
- Single-Mode (SMF) / Multi-Mode (MMF)
- Connector Type
- LC Duplex
- Wavelength TX
- 1270 nm to 1355 nm
- Wavelength RX
- 1270 nm to 1355 nm
- Reach
- 10 km (OS1/OS2) / 550 m (OM1/OM2)
- Cable Standard
- OS1 / OS2 / OM1 / OM2
- Transmitter Type
- FP
- Receiver Type
- PIN
- TX Power Min
- -9.5 dBm
- TX Power Max
- -3 dBm
- RX Sensitivity
- -20 dBm
- RX Power Max
- -3 dBm
- Encoding
- 8b/10b
- Supported Standards
- IEEE 802.3z / IEEE 802.3ah
- DDM/DOM Support
- No
- Power Consumption
- 1 W
- Supply Voltage
- 3.3V
- Operating Temperature
- Commercial (0°C to 70°C)
- Compatible Platforms
- Cisco Catalyst 2960 / 3560 / 3750 / 3850 / 4500 / 4900 / 6000 / 6800 / Nexus 2000 / 3000 / 5000 / 7000 / 9000
- Certifications
- FCC
- Height
- 8.5 mm
- Width
- 13.4 mm
- Depth
- 56.5 mm
- Weight
- 0.075 kg
GLC-LH-SM Use Case
Building Distribution Uplink
The Cisco GLC-LH-SM operates as a 1 GbE building-uplink optic where an access switch hands traffic to distribution over single-mode fiber. Its 1000BASE-LX/LH interface runs up to 10 km on standard single-mode fiber, using LC connectivity and a 1310 nm optical path. In this role, GLC-LH-SM extends Gigabit Ethernet beyond closet-distance copper while keeping the link within standard SFP port designs. The access layer gains a documented fiber uplink for building-to-building or closet-to-core aggregation across installed campus fiber links today.
Multimode Migration Path
The GLC-LH-SM sits in a migration path where existing multimode fiber still carries 1 GbE uplinks between access and distribution equipment. Cisco lists 1000BASE-LX/LH operation up to 550 meters over multimode fiber, with a mode-conditioning patch cord required for legacy multimode types. This use keeps Gigabit uplinks active while the cabling plant moves toward single-mode standards. The network gains a controlled transition point that supports installed MMF today and standard SMF spans as the fiber plan changes cleanly over time.
Management Services Uplink
The Cisco 1000BASE-LX/LH SFP Transceiver Module GLC-LH-SM operates in a management or services uplink where 1 GbE traffic needs a longer fiber path than copper supports. Its LC SFP form factor fits switch uplink slots, and the LX/LH optical profile reaches 10 km on single-mode fiber. The module connects remote access cabinets, out-of-band switches, or service aggregation points back to distribution. The topology gains a stable Gigabit Ethernet optical channel with distance matched to campus fiber rather than copper limits.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| GLC-LH-SM |  SFP-GE-L |  DWDM-SFP-3190 |  POM-OC48-IR1-LC | |
|---|---|---|---|---|
| Product Type | Optical Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | SFP | SFP | SFP | SFP |
| Data Rate | 1 Gbps | 1G | 1G | OC-48 (2.488 Gbps) |
| Connector Type | LC Duplex | LC | LC | LC |
| Wavelength | 1310nm | 1550nm | 1310 nm | |
| Transmission Distance | Long-Range | Long-Range | Intermediate-Range | |
| Fiber Type | Single-Mode (SMF) / Multi-Mode (MMF) | Single-mode | Single-mode | Single-mode |
| Max Distance | 10 km | 80 km | 10 km | |
| Supported Protocols | Ethernet | Ethernet / Fibre Channel | SONET, Ethernet | |
| Network Interface | Fiber | Fiber | Fiber | |
| Power Consumption | 1 W | 2.5W | 1W | N/A |
| Operating Temperature | Commercial (0°C to 70°C) | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | |
| Input Voltage | 3.3V | 3.3V | 3.3V | |
| Compatibility | Cisco, Juniper, Huawei, Arista | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista | |
| Product Name | SFP-GE-L Long Range 1G Transceiver | DWDM-SFP-3190 | POM-OC48-IR1-LC | |
| Height | 8.5 mm | 0.55 inches | 0.53 inches | N/A |
| Width | 13.4 mm | 1.0 inches | 1.78 inches | N/A |
| Depth | 56.5 mm | 1.6 inches | 0.33 inches | N/A |
| Weight | 0.075 kg | 0.1 lbs | 0.03 lbs | N/A |
Reviews & Ratings
N
Nathan Crowder
5
Strong compatibility with our core switches and stable throughput.
O
Owen Fitzgerald
4
Reliable gigabit connectivity over extended distances.
P
Peter Langford
5
DOM monitoring made link visibility simple.
Q
Quinn Halbrook
5
Dependable SFP for enterprise backbone connections.
R
Ralph Jennings
5
Clean optical output and predictable performance.
S
Stefan Morales
5
Excellent long-haul gigabit module for production networks.
Questions & Answers
What is GLC-LH-SM?
GLC-LH-SM is a Cisco 1000BASE-LX/LH SFP transceiver module for Gigabit Ethernet fiber links. It uses the SFP form factor, a 1310 nm optical interface, and dual LC connectors. The module supports up to 10 km on standard single-mode fiber and up to 550 m on multimode fiber when the correct cabling method is used.
What does the Cisco GLC-LH-SM model number mean?
GLC-LH-SM identifies a Cisco Gigabit Ethernet SFP optical transceiver for long-wavelength and long-haul 1000BASE-LX/LH links. GLC refers to Cisco's Gigabit SFP family, LH indicates long-haul optical operation, and SM indicates single-mode fiber support. The module also supports multimode fiber for shorter links, which makes it flexible for mixed fiber environments.
Is GLC-LH-SM an optical transceiver or a cable?
GLC-LH-SM is an optical transceiver module, not a fixed cable. It plugs into a compatible Cisco SFP port and connects to separate fiber patch leads. The module uses dual LC connectors, so buyers should use duplex LC fiber cabling that matches the link type, distance, and patch panel design across the network.
Where does GLC-LH-SM sit in the Cisco SFP lineup?
GLC-LH-SM sits in Cisco's Gigabit Ethernet SFP family as the 1000BASE-LX/LH option for 1310 nm fiber links. It is positioned between short-reach multimode modules such as GLC-SX-MM and longer-reach single-mode modules such as GLC-EX-SMD or GLC-ZX-SMD. Cisco later named GLC-LH-SMD as the migration replacement with DOM support.
What form factor does GLC-LH-SM use?
GLC-LH-SM uses the Small Form-Factor Pluggable, or SFP, form factor for Gigabit Ethernet ports. Cisco lists SFP module dimensions as 8.5 mm high, 13.4 mm wide, and 56.5 mm deep, with typical weight of 75 g or less. The hot-swappable design allows installation in compatible Cisco SFP slots without powering down the host platform.
What data rate does GLC-LH-SM support?
GLC-LH-SM supports 1 Gigabit Ethernet operation through a 1000BASE-LX/LH optical interface. It is intended for Gigabit Ethernet SFP ports, not 10G SFP+ or 25G SFP28 ports. The module should be paired with another compatible 1000BASE-LX/LH optical interface on the far end, with port speed and duplex settings matched to the host platform.
What wavelength does GLC-LH-SM use?
GLC-LH-SM uses a 1310 nm long-wavelength optical interface for 1000BASE-LX/LH connectivity. Cisco installation notes describe the family as 1300 nm class, while the data sheet cabling table lists 1310 nm for 1000BASE-LX/LH. This wavelength supports single-mode fiber reach and multimode operation when the correct mode-conditioning requirements are met.
What reach does GLC-LH-SM support?
GLC-LH-SM supports up to 10 km on ITU-T G.652 single-mode fiber and up to 550 m on multimode fiber. Cisco lists 550 m operation on 62.5 micron 500 MHz-km MMF and 50 micron 400 or 500 MHz-km MMF. A mode-conditioning patch cord is required for multimode fiber use according to the Cisco data sheet.
What connector type does GLC-LH-SM use?
GLC-LH-SM uses a dual LC/PC connector for transmit and receive fiber strands. Cisco notes that PC or UPC patch cords are supported, while APC patch cords are not supported. Buyers should match the module with duplex LC single-mode or multimode patch leads, depending on the fiber plant, link distance, and far-end transceiver.
Does GLC-LH-SM support digital optical monitoring?
GLC-LH-SM should not be treated as the DOM version of this optic. Cisco's end-of-sale notice lists GLC-LH-SM as the older GE SFP LC connector LX/LH transceiver and names GLC-LH-SMD as the replacement with DOM. Buyers who need diagnostic monitoring should choose GLC-LH-SMD or confirm DOM reporting on the exact module supplied.
What is GLC-LH-SM used for?
GLC-LH-SM is used for 1G fiber uplinks, switch-to-switch links, router connections, campus backbone runs, and access-to-distribution connections. Its 10 km single-mode reach suits interbuilding or larger campus networks, while its 550 m multimode support suits many in-building fiber runs. It is useful where Cisco equipment has Gigabit SFP ports instead of newer SFP+ ports.
What environment size fits GLC-LH-SM?
GLC-LH-SM fits small, medium, and large networks that need Gigabit Ethernet fiber connectivity between Cisco switches, routers, firewalls, or access devices. It is suitable for wiring closets, campus distribution, branch backhaul, industrial control rooms, and data center management links. The module is especially practical where a 1G optical uplink must reuse existing single-mode or multimode cabling.
What workloads suit GLC-LH-SM?
GLC-LH-SM suits standard Gigabit Ethernet traffic such as user access uplinks, management networks, surveillance backhaul, branch connectivity, campus distribution, and router handoffs. It is not intended for 10G server access or long-haul 70 km links. Buyers should select the module when 1G optical reach and Cisco platform compatibility matter more than high-speed aggregation.
Can GLC-LH-SM work on multimode fiber?
GLC-LH-SM can work on multimode fiber up to 550 m, but Cisco specifies mode-conditioning patch cords for 1000BASE-LX/LH over MMF. The requirement helps prevent differential mode delay and receiver issues when a long-wavelength LX/LH transmitter launches into multimode fiber. Installers should check fiber core size, patch cord type, and link loss before deployment.
Which Cisco platforms are compatible with GLC-LH-SM?
GLC-LH-SM is supported across many Cisco platforms with Gigabit Ethernet SFP ports, subject to the Cisco transceiver compatibility matrix. Typical platform families include Cisco Catalyst access switches, Catalyst modular switches, Cisco routers, Industrial Ethernet switches, Nexus management or 1G ports, and security appliances. Exact support depends on the chassis, line card, software release, and port capability.
Does GLC-LH-SM work with Cisco Catalyst switches?
GLC-LH-SM can work with supported Cisco Catalyst switches that provide Gigabit Ethernet SFP interfaces and list the module in Cisco's compatibility matrix. Common use cases include Catalyst access switch uplinks, distribution links, and fiber connections between wiring closets. Buyers should verify the exact Catalyst model, IOS or IOS XE release, and whether GLC-LH-SMD is the preferred replacement.
Does GLC-LH-SM work with Cisco routers?
GLC-LH-SM can work with supported Cisco routers and interface cards that accept Gigabit Ethernet SFP modules. Cisco platform compatibility should be checked for the exact ISR, ASR, NIM, EHWIC, or line card before ordering. Router deployments often use GLC-LH-SM for WAN handoff, campus fiber, service provider demarcation, or branch uplink connections.
What standards and cabling rules apply to GLC-LH-SM?
GLC-LH-SM complies with IEEE 802.3z 1000BASE-LX operation and uses a 1310 nm optical interface. Cisco lists dual LC/PC connectors for 1000BASE-LX/LH SFPs, a 2 m minimum cable distance for listed SFPs, and mode-conditioning patch cord requirements for multimode operation. PC or UPC patch cords are supported, while APC patch cords are not supported.
How does GLC-LH-SM compare with GLC-LH-SMD?
GLC-LH-SM is the older 1000BASE-LX/LH SFP, while GLC-LH-SMD is Cisco's replacement product with DOM support. Both target 1310 nm LX/LH links over single-mode and multimode fiber. GLC-LH-SMD is usually preferred for new purchases because it adds diagnostic monitoring and appears in current Cisco ordering information, while GLC-LH-SM mainly serves legacy replacements.
How does GLC-LH-SM compare with GLC-SX-MMD?
GLC-LH-SM supports 1310 nm 1000BASE-LX/LH links up to 10 km on single-mode fiber and 550 m on multimode fiber. GLC-SX-MMD supports 850 nm 1000BASE-SX links over multimode fiber only, with shorter reach for most fiber grades. GLC-LH-SM fits mixed SMF or MMF environments, while GLC-SX-MMD fits short multimode-only links with DOM.
How does GLC-LH-SM compare with GLC-EX-SMD?
GLC-LH-SM supports 1000BASE-LX/LH links up to 10 km on single-mode fiber. GLC-EX-SMD supports 1000BASE-EX links up to 40 km on single-mode fiber and includes DOM. GLC-LH-SM is suitable for campus and building-to-building links, while GLC-EX-SMD fits longer fiber spans where the optical budget exceeds standard LX/LH reach.
How does GLC-LH-SM compare with GLC-ZX-SMD?
GLC-LH-SM is a 1310 nm 1000BASE-LX/LH optic for 10 km single-mode links and 550 m multimode links. GLC-ZX-SMD is a 1550 nm 1000BASE-ZX optic for approximately 70 km over single-mode fiber, depending on link loss. GLC-LH-SM fits normal campus reach, while GLC-ZX-SMD fits extended metro or long backbone runs.
Is GLC-LH-SM available new from ORM Systems?
GLC-LH-SM new availability is limited because Cisco announced end of sale for the older Select Gigabit Ethernet SFP modules, with the last order date on March 8, 2013. ORM Systems can check surplus, channel, or replacement availability. Buyers needing a current Cisco option should also consider GLC-LH-SMD, the Cisco-listed replacement with DOM support.
Is GLC-LH-SM available refurbished from ORM Systems?
GLC-LH-SM can be requested from ORM Systems in certified refurbished condition when tested inventory is available. Refurbished sourcing is common for legacy optics where installed platforms still require the original SKU. ORM Systems can confirm Cisco original status, connector condition, optical testing, module identification, warranty terms, and whether GLC-LH-SMD is an acceptable replacement.
How much does GLC-LH-SM cost?
GLC-LH-SM pricing depends on condition, quantity, Cisco original status, replacement suitability, stock source, warranty cover, and delivery destination. Legacy optics can vary in cost because supply often comes from refurbished, surplus, or remaining channel inventory. ORM Systems can quote single replacements, matched spare quantities, or alternative GLC-LH-SMD modules when current Cisco stock is preferred.
Is GLC-LH-SM end of life?
GLC-LH-SM is past Cisco end of sale and last support milestones. Cisco announced end of sale for Select Gigabit Ethernet SFP modules on March 8, 2012. The last Cisco order date was March 8, 2013, the last ship date was June 6, 2013, and the last date of support was March 31, 2018.
What lead time should buyers expect for GLC-LH-SM?
GLC-LH-SM lead time depends on tested refurbished stock, required quantity, Cisco original requirements, and shipping destination. Because the original SKU is legacy, availability can change quickly. ORM Systems can check current inventory, advise whether GLC-LH-SMD is the better substitute, reserve tested modules, and provide realistic dispatch timing before purchase.
Are bulk discounts available for GLC-LH-SM?
Bulk pricing for GLC-LH-SM may be available when ORM Systems can source multiple tested Cisco original or compatible units. Volume buyers should provide quantity, acceptable condition, required delivery date, host platform details, and whether GLC-LH-SMD substitution is allowed. Bulk orders are useful for campus spare pools, switch refresh staging, and long-term legacy maintenance.
What warranty applies to GLC-LH-SM from ORM Systems?
GLC-LH-SM warranty terms from ORM Systems should be confirmed in the quotation because Cisco support for the original SKU has ended. Refurbished or surplus modules may carry reseller warranty rather than Cisco support. Buyers should request written warranty duration, replacement process, testing coverage, and any compatibility exclusions for the target Cisco platform.
How is refurbished GLC-LH-SM stock tested before dispatch?
Refurbished GLC-LH-SM stock should be checked for host recognition, stable 1G link operation, clean dual LC connectors, correct Cisco identification, physical latch condition, and optical transmit and receive behavior. Testing helps reduce failures caused by contaminated connectors, wrong-coded optics, or marginal light levels. ORM Systems can confirm the inspection process before shipment.
What certifications and compliance standards apply to GLC-LH-SM?
GLC-LH-SM aligns with IEEE 802.3z 1000BASE-LX operation and Cisco's Gigabit Ethernet SFP module family. Project teams needing formal evidence should request current documentation for the exact module supplied, especially when buying refurbished stock. Relevant checks include laser safety, EMC, RoHS position, connector type, host compatibility, and any country-specific procurement requirements.
How is GLC-LH-SM installed?
GLC-LH-SM installs by inserting the module into a compatible Cisco Gigabit SFP port, connecting duplex LC fiber, and checking link status on both ends. Engineers should clean connectors, verify single-mode or multimode cabling, use mode-conditioning patch cords for MMF, confirm the far end uses compatible 1000BASE-LX/LH optics, and review platform logs after insertion.
Does GLC-LH-SM require software or licensing?
GLC-LH-SM does not require a separate optic license, but the host Cisco platform must support the transceiver and software release. Some switches or routers enforce platform-specific transceiver compatibility. Buyers should check Cisco's compatibility matrix for the exact chassis, line card, SFP port, IOS or IOS XE version, and whether GLC-LH-SMD is recommended instead.
What cables and accessories are needed with GLC-LH-SM?
GLC-LH-SM requires duplex LC fiber patch cords, using single-mode fiber for links up to 10 km or multimode fiber for links up to 550 m. Cisco specifies mode-conditioning patch cords for multimode operation. Installers may also need fiber cleaning tools, inspection scopes, labels, dust caps, and compatible patch panel adapters for reliable deployment.
Where can buyers purchase GLC-LH-SM in the UK?
Buyers can purchase GLC-LH-SM in the UK through ORM Systems by requesting a quote for the Cisco 1000BASE-LX/LH SFP transceiver module. ORM Systems can support certified refurbished sourcing, surplus checks, GLC-LH-SMD replacement guidance, warranty confirmation, compatibility review, and delivery planning for Cisco switches, routers, and industrial Ethernet platforms.
Does ORM Systems ship GLC-LH-SM internationally?
ORM Systems ships internationally and can quote GLC-LH-SM for global delivery when stock and export conditions allow. International buyers should confirm destination, duties, taxes, insurance, delivery deadline, and any import documentation required for optical modules. ORM Systems can also support multi-site spare orders and replacement planning for legacy Cisco 1G fiber networks.