D-Link Systems, Inc.
D-Link 1000BASE-SX SFP Multimode Optical Transceiver, Duplex LC, up to 550 m (DEM-311GT)
Highlights: 1GbE links up to 550 m over 50/125 µm multimode fiber • Duplex LC connector • 850 nm optics • Hot-pluggable SFP module
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- 1GbE SFP Optical Transceiver: Supports 1000BASE-SX links for switch uplinks over multimode fiber
- Multimode Fiber Reach: Up to 550 m (1,804 ft) over 50/125 µm fiber or up to 300 m (984 ft) over 62.5/125 µm fiber
- Duplex LC Fiber Interface: Uses 850 nm optics over two strands of multimode fiber
- D-Link Switch Compatibility: Supports 1GbE SFP uplinks on the DGS-1018P and DGS-1026P, plus compatible 1GbE SFP ports on DGS-1210, DGS-1250, DGS-1510, DGS-1530, DGS-3130 and DGS-3630 switches. Switches and Cabling sold separately.
- Hot-Pluggable Design: Supports module replacement while the host switch remains powered on
- Operating Temperature: Rated for 32°F to 158°F (0°C to 70°C)
- Ethernet and Module Standards: Supports IEEE 802.3z 1000BASE-SX and meets SFP MSA specifications
- Environmental Compliance: RoHS compliant
- Warranty: 5-Year Limited Warranty
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Trusted Business-Class Reliability: With 40+ years of networking experience, D-Link offers Ethernet switches and optical interconnects for building and expanding business networks
For business-class solutions, reseller pricing, distribution availability and partner access program, Please reach out to our business solutions team:(888)354-6574 or solutions@us.dlink.com
Product Specifications
| Ethernet Interface | 1GbE (1000BASE-SX) |
|---|---|
| Form Factor | Hot-pluggable SFP |
| Fiber Type | Multimode fiber (50/125 µm or 62.5/125 µm) |
| Optical Connector | Duplex LC |
| Rated Reach |
50/125 µm: Up to 550 m (1,804 ft) 62.5/125 µm: Up to 300 m (984 ft) |
| Optical Wavelength | 850 nm |
| Operating Temperature | 32°F to 158°F (0°C to 70°C) |
| Standards & Compliance | IEEE 802.3z (1000BASE-SX), SFP MSA and RoHS |
| Switch Compatibility |
1GbE SFP uplinks: DGS-1018P and DGS-1026P Compatible 1GbE SFP ports: Select DGS-1210, DGS-1250, DGS-1510, DGS-1530, DGS-3130 and DGS-3630 models Contact D-Link to confirm compatibility with other switch models |
| Warranty | 5-Year Limited Warranty |
Switches and fiber cabling are sold separately
US Domestic Orders To Contiguous 49 States
- Orders are processed Monday – Friday, excluding holidays.
- Orders using Fedex SmartPost are estimated to arrive within 5 to 7 business days (not including Sunday or holidays) following credit card authorization and order processing.
- Please allow 1 to 3 business days to process order.
- Orders placed after 10:00 am Pacific Standard Time will not be processed until the following business day.
- D-Link will use their discretion on using Fedex SmartPost carriers only.
- Sales tax are not counted towards the merchandise subtotal. Only one promotional code can be used per order.
Shipping Methods and Rates
|
Order Amount |
Fedex SmartPost |
Estimated Arrival Time |
|
Over $30.00 |
FREE |
5-7 business days |
- Free shipping on orders over $30 valid (not including sales tax) on Fedex SmartPost shipping only. Not valid on previous purchases. Valid for limited time only.
Shipping Timeline
- Shipping time does not include processing time of 1-3 business days.
- Estimated arrival times are not guaranteed. Weather delays and other unforeseen circumstances may impact delivery time.
- Fedex does not deliver on Sundays or holidays.
D-Link Holidays
Packages will not be processed or shipped on the following acknowledged holidays.
|
Holiday |
Acknowledged Date |
|
New Year’s Day |
Monday, January 1, 2024 |
|
President’s Day |
Monday, February 19, 2024 |
|
Good Friday |
Friday, March 29, 2024 |
|
Memorial Day |
Monday, May 27, 2024 |
|
Fourth of July |
Thursday, July 4, 2024 |
|
Labor Day |
Monday, September 2, 2024 |
|
Thanksgiving Day |
Thursday, November 28, 2024 |
|
Day after Thanksgiving |
Friday, November 29, 2024 |
|
Christmas Day |
Wednesday, December 25, 2024 |
|
New Year's Eve |
Tuesday, December 31, 2024 |
Additional Information
- We do not offer shipping to P.O. Boxes.
- We are currently not offering shipping to the following locations:
- Alaska
- American Samoa
- Micronesia
- Guam
- Hawaii
- Marshall Islands
- Northern Mariana Islands
- Palau
- Puerto Rico
- S. Virgin Islands
- APO/FPO
Returns - Physical Products
Products purchased directly from the official shop.us.dlink.com site may be returned within 30 days of the delivery date, subject to the terms and conditions below.
To initiate a return, customers must contact D-Link to obtain a Return Merchandise Authorization (RMA) and return instructions. Returns received without an approved RMA may not be processed.
Returned products must be received in good condition and include:
- the unit with an intact serial/UPC label
- original power supply
- all accessories originally included
- Proof of purchase or invoice
We strongly recommend including the original packaging and documentation. If items are missing, damaged, or show signs of excessive use, the refund amount may be reduced accordingly.
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Restocking Fees
Returned products may be subject to a restocking fee of up to 15%, at D-Link’s discretion, based on product condition, completeness, and the nature of the return.
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Return Shipping
Unless the product is confirmed or deemed defective by the D-Link technical support team, or the return is due to a shipping error by D-Link, the customer is responsible for return shipping costs.
We recommend using a carrier that provides a tracking number. D-Link is not responsible for items that are lost or damaged in transit.
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Defective or Incorrect Products
If a product is confirmed or deemed defective by the D-Link technical support team, or an incorrect item was shipped, D-Link will provide return instructions and cover applicable return shipping costs.
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Refund Processing
Approved refunds will be issued to the original payment method once the returned product has been received and inspected.
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Refund Timing
Refunds are typically processed within seven (7) to ten (10) business days of D-Link’s receipt of the returned product. Please note that your financial institution may take additional time to post the refund to your account.
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Final Sale Items
Products clearly marked as Final Sale are not eligible for return, exchange, or refund.
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Services
All sales of services, including technical support or service plans, are final and non-refundable.
Consumer Rights
Nothing in this policy limits any rights you may have under applicable consumer protection laws that vary by state.
To start a return:
Use the contact methods available at: https://support.dlink.com/search.aspx
1GbE Multimode Fiber Links up to 550 m (1,804 ft)
Extend Gigabit Ethernet over multimode fiber with the D-Link DEM-311GT. This hot-pluggable 1000BASE-SX SFP transceiver uses 850 nm optics and a duplex LC connector to support links up to 550 m (1,804 ft) over 50/125 µm fiber or up to 300 m (984 ft) over 62.5/125 µm fiber.
Pair with D-Link Switches
Use the DEM-311GT for 1GbE fiber uplinks on the DGS-1018P and DGS-1026P. It also works with compatible 1GbE SFP ports on select DGS-1210, DGS-1250, DGS-1510, DGS-1530, DGS-3130 and DGS-3630 switches. Contact D-Link to confirm compatibility with other models.
Switches and fiber cabling are sold separately
Applications
Enterprise Wiring Closet Uplinks • In-Building Fiber Backbones • Switch-to-Switch Fiber Links
5-Year Limited Warranty
1GbE SFP
Hot-pluggable 1000BASE-SX optical transceiver
Multimode Fiber Reach
Up to 550 m (1,804 ft) on 50/125 µm fiber or up to 300 m (984 ft) on 62.5/125 µm fiber
Duplex LC Connector
850 nm optics over two strands of multimode fiber
D-Link Switch Compatibility
1GbE SFP uplinks: DGS-1018P and DGS-1026P
Compatible 1GbE SFP ports: Select DGS-1210, DGS-1250, DGS-1510, DGS-1530, DGS-3130 and DGS-3630 models
Operating Temperature
32°F to 158°F (0°C to 70°C)
Standards & Compliance
IEEE 802.3z (1000BASE-SX), SFP MSA and RoHS
Data rates and link distances are specified maximums. Actual performance and reach may vary with host equipment, software version, port configuration, cable or fiber type, link loss and operating conditions. Switches and cabling are sold separately.
Technical Specifications
DEM-311GT
1000BASE-SX SFP Multimode Optical Transceiver
- Designed For
- 1GbE links over duplex multimode fiber
- Applications
- Enterprise wiring closet uplinks, in-building fiber backbones and switch-to-switch fiber links
Optical Link & Cabling
| Ethernet interface | 1GbE (1000BASE-SX) |
|---|---|
| Fiber type | 50/125 µm or 62.5/125 µm multimode fiber |
| Optical connector | Duplex LC |
| Rated reach | 50/125 µm: Up to 550 m (1,804 ft) 62.5/125 µm: Up to 300 m (984 ft) |
| Nominal wavelength | 850 nm |
| Transmit optical power | −8 to −3 dBm |
| Receive optical power | −22 to −3 dBm |
Host Interface & Installation
| Host form factor | SFP |
|---|---|
| Installation | Hot-pluggable |
| Switch compatibility |
1GbE SFP uplinks: DGS-1018P and DGS-1026P Compatible 1GbE SFP ports: Select DGS-1210, DGS-1250, DGS-1510, DGS-1530, DGS-3130 and DGS-3630 models Contact D-Link to confirm support for other switch models. Switches and fiber cabling are sold separately. |
| Supply voltage | 3.3 V |
| Rated input current | 300 mA |
| Dimensions | 13.4 × 56.5 × 8.5 mm (W × D × H) |
| Weight | 0.71 oz (20 g) |
Operating & Storage Conditions
| Operating temperature | 32°F to 158°F (0°C to 70°C) |
|---|---|
| Storage temperature | −40°F to 185°F (−40°C to 85°C) |
| Operating humidity | 5% to 95%, non-condensing |
| Storage humidity | 5% to 95%, non-condensing |
Standards, Compliance & Warranty
| Ethernet standard | IEEE 802.3z (1000BASE-SX) |
|---|---|
| Module specifications | SFP MSA compliant |
| Regulatory & environmental | FCC Class B and RoHS |
| Warranty | 5-Year Limited Warranty |
Frequently Asked Questions
What is the DEM-311GT used for?
The DEM-311GT is a 1000BASE-SX SFP optical transceiver for 1GbE links over multimode fiber. Typical uses include enterprise wiring closet uplinks, in-building fiber backbones and switch-to-switch fiber links.
What fiber and connector does it use?
The DEM-311GT uses 850 nm optics and a duplex LC connector. Use two strands of 50/125 µm or 62.5/125 µm multimode fiber.
How far can the link reach?
Rated reach is up to 550 m (1,804 ft) over 50/125 µm multimode fiber or up to 300 m (984 ft) over 62.5/125 µm multimode fiber. Actual reach depends on the total optical loss across the link.
Which D-Link switches can I use it with?
1GbE SFP uplinks: DGS-1018P and DGS-1026P
Compatible 1GbE SFP ports: Select DGS-1210, DGS-1250, DGS-1510, DGS-1530, DGS-3130 and DGS-3630 models
Contact D-Link to confirm support for other switch models.
What should I check before deploying the link?
Confirm that both host ports support their respective optics at 1GbE and that the far-end optic supports 1000BASE-SX. Check that transmit connects to receive and that total optical loss is within the link budget.
Can I replace the transceiver while the switch is powered on?
Yes. The module is hot-pluggable and can be installed or removed while the switch remains powered on. Removing it interrupts the link it serves.
Are the switch and fiber cabling included?
Switches and fiber cabling are sold separately.
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