Cisco 1000BASE-SX SFP Transceiver, Multimode 850nm, DOM
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PRODUCT DESCRIPTION
Cisco SFP mini-GBIC Module (GLC-SX-MMD) — Local Warranty
1000BASE-SX Short-Reach Multimode Optic
The Cisco GLC-SX-MMD is a 1000BASE-SX short-wavelength SFP (mini-GBIC) transceiver operating at 850 nm over multimode fibre. It is the standard Cisco optic for Gigabit Ethernet links within a building or across a campus riser, with reach from 220 m on older 62.5 µm fibre up to 1 km on laser-optimised OM3 and OM4 fibre.
Reach Depends on Your Fibre
Cisco specifies 220 m on 62.5 µm fibre rated 160 MHz·km and 275 m on 200 MHz·km fibre; 500 m on 50 µm fibre rated 400 MHz·km and 550 m on 500 MHz·km (OM2) fibre; and 1 km on 50 µm OM3 (2000 MHz·km) and OM4 (4700 MHz·km) fibre. Checking the fibre grade before ordering avoids link problems on longer runs.
Digital Optical Monitoring
The "D" in GLC-SX-MMD indicates Digital Optical Monitoring (DOM). On supported Cisco platforms, the host switch can read optical transmit and receive power and module temperature, which helps diagnose dirty connectors or marginal links.
Extended Temperature Range
Cisco rates the GLC-SX-MMD for the extended (EXT) operating temperature range of -5 to 85°C.
Hot-Pluggable, IEEE 802.3z Compliant
The module is a hot-pluggable SFP with a dual LC/PC connector and complies with IEEE 802.3z. Cisco describes 1000BASE-SX SFPs as interchangeable across a wide range of Cisco products and mixable with 1000BASE-LX/LH or 1000BASE-ZX interfaces on a per-port basis.
Replacement for GLC-SX-MM
Cisco named the GLC-SX-MMD as the replacement when it ended sale of the earlier non-DOM GLC-SX-MM and the SFP-GE-S module (End-of-Sale 8 March 2013).
Cisco GLC-SX-MMD Datasheet — Technical Specifications
Optical
| Standard | IEEE 802.3z 1000BASE-SX |
| Wavelength | 850 nm |
| Fibre type | Multimode only |
| Transmit power | -9.5 to -3 dBm |
| Receive power | -17 to 0 dBm |
Cable Distances
| 62.5 µm, 160 MHz·km (FDDI-grade) | 220 m |
| 62.5 µm, 200 MHz·km (OM1) | 275 m |
| 50 µm, 400 MHz·km | 500 m |
| 50 µm, 500 MHz·km (OM2) | 550 m |
| 50 µm, 2000 MHz·km (OM3) | 1 km |
| 50 µm, 4700 MHz·km (OM4) | 1 km |
Physical
| Form factor | SFP, hot-pluggable |
| Connector | Dual LC/PC |
| Dimensions (H x W x D) | 8.5 x 13.4 x 56.5 mm |
Environmental & Monitoring
| Operating temperature | -5 to 85°C (EXT) |
| Digital Optical Monitoring | Yes |
Compatibility & Software Support
Host Compatibility
The GLC-SX-MMD is supported in SFP ports across many Cisco switches, routers and line cards. Platform support, DOM reporting and minimum software release vary, so confirm the host in the Cisco Optics Compatibility Matrix.
Interoperability
Both ends of the link must be 850 nm 1000BASE-SX optics over multimode fibre. It does not link to 1310 nm 1000BASE-LX/LH optics such as the GLC-LH-SMD, although the two types can be used on different ports of the same switch.
Lifecycle
The GLC-SX-MMD is itself the replacement product named in Cisco's End-of-Sale notice for the GLC-SX-MM and SFP-GE-S (End-of-Sale 8 March 2013; last date of support 31 March 2018).
Warranty
Local Singapore warranty. For warranty claims, keep your SourceIT invoice as proof of purchase.
Package Contents & Cisco 1000BASE SFP Family Ordering Information
What the Part Number Covers
One 1000BASE-SX SFP transceiver module. Fibre patch cords are not included.
Cisco 1000BASE SFP Family
| Model | Key difference |
| GLC-SX-MMD (this listing) | 1000BASE-SX, 850 nm, multimode 220 m to 1 km, DOM |
| GLC-LH-SMD | 1000BASE-LX/LH, 1310 nm, SMF 10 km / MMF 550 m, DOM |
| GLC-EX-SMD | 1000BASE-EX, 1310 nm, up to 40 km, DOM |
| GLC-ZX-SMD | 1000BASE-ZX, 1550 nm, up to 70 km, DOM |
| GLC-BX-D / GLC-BX-U | 1000BASE-BX single-strand bidirectional, 10 km |
| GLC-TE | 1000BASE-T copper, 100 m |
Cisco Switches at SourceIT with SFP Ports
| Item | SFP ports |
| Cisco Catalyst 9200L C9200L-48P-4G-E | 4 x 1G SFP uplinks |
| Cisco Business CBS350-24P-4G | 4 x 1G SFP uplinks |
| Cisco C9300-NM-8X= Network Module | 8 x SFP+ (1G or 10G) |
Datasheet & Downloads
| Document | Link |
| Cisco SFP Modules for Gigabit Ethernet Applications Data Sheet | www.cisco.com |
| Cisco 1000BASE-SX SFP product page | www.cisco.com |
| Cisco SFP and SFP+ Transceiver Module Installation Notes | www.cisco.com |
| Cisco Optics Compatibility Matrix | tmgmatrix.cisco.com |
| End-of-Sale Announcement for GLC-SX-MM / GLC-LH-SM (replacement notice) | www.cisco.com |
Frequently Asked Questions — Cisco GLC-SX-MMD
How far will the GLC-SX-MMD reach?
It depends on the multimode fibre: 220-275 m on 62.5 µm fibre, 500-550 m on standard 50 µm fibre, and up to 1 km on OM3 or OM4.
Does it work on single-mode fibre?
No. 1000BASE-SX is a multimode-only optic. For single-mode fibre, use a 1000BASE-LX/LH module such as the GLC-LH-SMD.
What is the difference between GLC-SX-MM and GLC-SX-MMD?
The GLC-SX-MMD supports Digital Optical Monitoring and is Cisco's named replacement for the discontinued GLC-SX-MM.
What connector does it use?
A dual LC/PC connector, so use LC-terminated multimode patch cords.
What temperature range is it rated for?
Cisco rates it for the extended range, -5 to 85°C.
