GLC-SX-MMD - Cisco SFP Module Overview
GLC-SX-MMD - Cisco SFP Module is a genuine modular capacity expansion product from Cisco, a leading enterprise networking vendor whose Catalyst, Nexus and ISR families power campus, data-center and branch networks worldwide. Belonging to the Cisco family, the GLC-SX-MMD unit is built to the original factory specification, so it integrates with existing Cisco deployments predictably and behaves exactly as the platform documentation describes. In the network, it is installed into a compatible chassis slot, where it works alongside the supervisor and line cards to extend the platform’s capabilities.
This unit follows the original factory specification for the Cisco family, covering its intended role without compatibility surprises. Standard mounting, cabling and management practices apply, and it interoperates with surrounding hardware using the same procedures as other Cisco equipment already deployed in the network.
Typical deployments include short-reach data-center interconnects, campus backbone fiber links, and carrier access and metro networks. Organizations commonly source it for refresh programs, capacity expansion and spares management, keeping a tested unit on hand so outages stay short and replacements are predictable. The factory detail for this unit reads: “Cisco GLC-SX-MMD 1000BASE-SX SFP transceiver module, MMF, 850nm, DOM”. This makes it a practical choice when original-spec hardware is required at a predictable cost.
Every unit at LinkNewNet is inspected and tested before dispatch, and stock is graded, cleaned and verified for correct operation, including port status, console access and firmware state. Our warranty coverage and responsive technical support protect the purchase after it arrives, and our team can confirm revision levels and software compatibility before you order. For volume requirements we also offer configuration checks and staged delivery options.
Contact our sales team for current availability, lead time and shipping options for the GLC-SX-MMD. We respond quickly with stock status and a firm quote, so you can plan the refresh or expansion with confidence.
Key Specifications
Applications
Capacity Expansion
Add ports and performance to existing chassis.
Upgrade Path
Modernize aging platforms with compatible modules.
Flexible I/O
Mix copper, fiber and high-speed uplinks.
Buying a Pre-Owned GLC-SX-MMD
Verify the unit is tested, firmware confirmed, and condition documented. Every unit is fully tested and warranty covered. Contact our team for current stock and availability.
GLC-SX-MMD Specifications | |
| Product Brand | Cisco |
| Product Name | GLC-SX-MMD |
| Data Rate | 1 Gbps |
| Interface | SFP |
| Form Factor | Small Form-Factor Pluggable (SFP) |
| Cable Type | Multi-Mode Fiber (MMF) |
| Optical Wavelength | 850 nm |
| DOM Support | Yes |
| Max Transfer Distance | 550 meters (on 50/125 µm MMF) |
| Tx Power | -9.5 dBm to -3 dBm |
| Rx Sensitivity | -17 dBm |
| Operating Temperature | 0°C to 70°C (32°F to 158°F) |
| Storage Temperature | -40°C to 85°C (-40°F to 185°F) |
| Power Consumption | Less than 1W |
| Protocols Supported | Gigabit Ethernet |
| Compliance | IEEE 802.3z |
| EMI Compatibility | FCC Part 15 Class B |
| Warranty | Limited lifetime |
| Hot Swappable | Yes |
| Safety/Environmental Standards | RoHS |
| MTBF | 5 million hours (approx.) |
GLC-SX-MMD - Product Notes
This listing is a specific SKU variant of the GLC-SX-MMD family. Review the specifications above and confirm compatibility with your existing infrastructure, including software version, mounting, and interface requirements, before ordering.
For volume requirements we offer configuration checks and staged delivery options. Our team can confirm revision levels, software compatibility, and lead time before you place an order.
Every unit at LinkNewNet is inspected and tested before dispatch, and stock is graded, cleaned and verified for correct operation.
GLC-SX-MMD - Cisco Series Notes
This listing is part of the Cisco enterprise networking product family, sourced and tested by LinkNewNet for enterprise deployment. Cisco transceiver/optic module provides physical-layer connectivity for switches and routers, converting electrical to optical signals over fiber or copper media.
Deployment guidance: When planning this GLC-SX-MMD unit into a network, confirm the software image (IOS/IOS-XE/NX-OS) required, the power and cooling profile, and the upstream/downstream interface types that match your existing infrastructure. For a like-for-like refresh, match the feature set of the units already in service so management and automation behave consistently.
Our Cisco reconditioning process: Every pre-owned Cisco unit at LinkNewNet passes a documented reconditioning flow before dispatch - visual inspection, internal cleaning, firmware verification, port-by-port testing, and configuration reset to factory defaults. This ensures the unit you receive operates reliably and integrates cleanly with your existing Cisco management tools.
Related models in this family: GLC-LH-SMD, GLC-TE, DWDM-SFP-3112, SFP-OC48-LR2, SFP-GPON-C-I. Compare specifications to confirm the right port density, feature set and uplink options for your deployment.
Model code: D = DC power - this suffix indicates the feature set, power, or regulatory variant of the GLC-SX-MMD, which affects software licensing and regional compliance.
