D-Link Systems, Inc.
D-Link 40GBASE-LR4 QSFP+ Single-Mode Optical Transceiver, Duplex LC, up to 10 km (DEM-QX10Q-LR4)
Highlights: 40GbE links up to 10 km over 9/125 µm single-mode fiber • Duplex LC connector • Four optical wavelengths • Hot-pluggable QSFP+ module • Digital Diagnostics Monitoring (DDM)
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40GBASE-LR4 QSFP+ Optical Transceiver for 40GbE fiber uplinks in data center and enterprise networks
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Up to 10 km (6.21 mi) of Reach over 9/125 µm single-mode fiber
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Duplex LC Connector carries 40GbE over two fiber strands using four optical wavelengths
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Digital Diagnostics Monitoring (DDM) provides readings for transmit and receive optical power, module temperature, and supply voltage
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Hot-Pluggable Design allows module replacement while the host switch remains powered on
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Operating Temperature of 32°F to 158°F (0°C to 70°C)
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Standards & Compliance include IEEE 802.3ba, MSA, and RoHS
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5-Year Limited Warranty
- Trusted Business-Class Reliability: With 40+ years of networking experience, D-Link offers Ethernet switches and optical interconnects for building and expanding data center 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 | 40GbE (40GBASE-LR4) |
|---|---|
| Form Factor | Hot-pluggable QSFP+ |
| Fiber Type | 9/125 µm single-mode fiber |
| Optical Connector | Duplex LC |
| Rated Reach | Up to 10 km (6.2 mi) |
| Optical Wavelengths | 1271, 1291, 1311 and 1331 nm |
| Digital Diagnostics | DDM monitors transmit and receive optical power, module temperature, and supply voltage. |
| Supply Voltage | 3.3 V |
| Standards & Compliance | IEEE 802.3ba, MSA and RoHS |
| Warranty | 5-Year Limited Warranty |
| Switch Compatibility | D-Link DXS-3610 Series (DXS-3610-54S and DXS-3610-54T) via uplink ports operating at 40GbE. |
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
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Order Amount |
Fedex SmartPost |
Estimated Arrival Time |
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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.
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Holiday |
Acknowledged Date |
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New Year’s Day |
Monday, January 1, 2024 |
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President’s Day |
Monday, February 19, 2024 |
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Good Friday |
Friday, March 29, 2024 |
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Memorial Day |
Monday, May 27, 2024 |
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Fourth of July |
Thursday, July 4, 2024 |
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Labor Day |
Monday, September 2, 2024 |
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Thanksgiving Day |
Thursday, November 28, 2024 |
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Day after Thanksgiving |
Friday, November 29, 2024 |
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Christmas Day |
Wednesday, December 25, 2024 |
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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
40GbE Single-Mode Fiber Links up to 10 km (6.21 mi)
The D-Link DEM-QX10Q-LR4 is a hot-pluggable 40GBASE-LR4 QSFP+ optical transceiver. It supports 40GbE links up to 10 km (6.21 mi) over 9/125 µm single-mode fiber with a duplex LC connector.
Pair with D-Link Switches
Compatible with uplink ports on the DXS-3610-54S and DXS-3610-54T operating at 40GbE. For other switch models, contact D-Link to confirm transceiver support. Switches and fiber cabling are sold separately.
Applications
Data Center Uplinks • Network Aggregation • Enterprise Fiber Backbones • Campus Building-to-Building Links
5-Year Limited Warranty
40GbE QSFP+
40GBASE-LR4 optical transceiver for 40GbE fiber uplinks
Reach up to 10 km (6.21 mi)
Rated for 9/125 µm single-mode fiber
Duplex LC Connector
Connects to two-strand single-mode fiber
Pair with D-Link Switches
Compatible with DXS-3610-54S and DXS-3610-54T uplinks operating at 40GbE. Switches sold separately.
Operating Temperature
32°F to 158°F (0°C to 70°C)
Standards & Compliance
IEEE 802.3ba, 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-QX10Q-LR4
40GBASE-LR4 QSFP+ Single-Mode Optical Transceiver
- Designed For
- 40GbE links over duplex single-mode fiber
- Applications
- Data center and enterprise fiber uplinks
Optical Link & Cabling
| Ethernet interface | 40GbE (40GBASE-LR4) |
|---|---|
| Fiber type | 9/125 µm single-mode fiber |
| Optical connector | Duplex LC |
| Rated reach | Up to 6.21 mi (10 km) |
| Nominal wavelengths | 1271 nm, 1291 nm, 1311 nm and 1331 nm |
| Transmit optical power range | −7 to +2.3 dBm (revision C1) |
| Optical link budget | 6.7 dB (revision C1) |
Host Interface & Installation
| Host form factor | QSFP+ |
|---|---|
| Installation | Hot-pluggable |
| Switch compatibility | D-Link DXS-3610-54S and DXS-3610-54T uplink ports operating at 40GbE. Transceiver sold separately. |
| Digital diagnostics (DDM/DOM) | DDM monitors transmit and receive optical power, module temperature, and supply voltage. |
Operating & Storage Conditions
| Operating temperature | 32°F to 158°F (0°C to 70°C) |
|---|---|
| Storage temperature | Contact D-Link |
| Operating humidity | Contact D-Link |
| Storage humidity | Contact D-Link |
Standards, Compliance & Warranty
| Ethernet standard | IEEE 802.3ba |
|---|---|
| Module specifications | MSA compliant |
| Regulatory & environmental | RoHS compliant |
| Warranty | 5-Year Limited Warranty |
Frequently Asked Questions
What is the DEM-QX10Q-LR4 used for?
The DEM-QX10Q-LR4 is a 40GBASE-LR4 QSFP+ optical transceiver for 40GbE uplinks over single-mode fiber. It supports links between network rooms or buildings in data center, enterprise and campus networks.
What fiber and connector does it use?
Use 9/125 µm duplex single-mode fiber with LC connectors. The transceiver uses four optical wavelengths to carry 40GbE over the duplex fiber link.
How far can the link reach?
The rated reach is up to 6.21 mi (10 km) over single-mode fiber. Actual reach depends on total optical loss across the link, including connectors, splices and patch panels.
Which switches can I use it with?
The module is supported on D-Link DXS-3610-54S and DXS-3610-54T uplink ports operating at 40GbE. For other equipment, confirm that the intended port supports the module and 40GBASE-LR4.
What should I confirm before deploying the link?
Check that both host ports support their respective optics at 40GbE, that the far-end optic uses 40GBASE-LR4, and that total fiber loss is within the link budget.
The module supports Digital Diagnostics Monitoring (DDM) for transmit and receive optical power, module temperature and supply voltage. Contact D-Link for switch-specific software or port requirements.
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 the module interrupts the link it serves.
What’s included with the transceiver?
The DEM-QX10Q-LR4 transceiver is sold individually. Switches and fiber cabling are sold separately.
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