MikroTik XQ+31LC02D 100G QSFP28 LR4 2km SMF Dual LC
The MikroTik XQ+31LC02D is a 100G QSFP28 single-mode fiber transceiver — Dual LC UPC connector, 4× independent full-duplex 25G channels, LAN-WDM wavelengths 1271/1291/1311/1331 nm, 2km reach on OS2 single-mode fiber (100GBASE-LR4), built-in digital diagnostic monitoring (optical power), operates to +70°C, hardened for temperature, humidity, and EMI. Compatible with MikroTik CCR2216, CRS504-4XQ-IN/OUT, CRS510-8XS-2XQ-IN, CRS518-16XS-2XQ-RM, and any IEEE 100GBASE-LR4 compliant QSFP28 port. MTBF ~200,000 hours at 25°C. No certifications listed (optical module). USD 229.00.
We only offer IC Certified products. For international products, contact us.
Ship Charge Will Display As Free Until Ship Address / Location Is Provided To Calculate Ship Charge.
The MikroTik XQ+31LC02D is the mid-reach member of MikroTik's 100G QSFP28 optical transceiver family — 2km on single-mode fiber via Dual LC UPC at USD 229.00, positioned directly between the XQ+85MP01D SR4 (100m multimode, USD 89.00) and the XQ+31LC10D LR4 (10km single-mode, USD 349.00). It is the correct transceiver for campus inter-building connections and metro short-haul links where 100 metres is insufficient and paying for 10km LR4 reach is unnecessary.
**4× 25G LAN-WDM — how 100GBASE-LR4 works at 2km**
The XQ+31LC02D implements 100GBASE-LR4 using LAN-WDM (Wavelength Division Multiplexing) — four independent 25G full-duplex optical channels, each on a distinct wavelength: 1271nm, 1291nm, 1311nm, and 1331nm. All four wavelengths are multiplexed onto a single OS2 single-mode fiber strand per direction via a Dual LC UPC connector — one fiber transmits (all four wavelengths combined), one fiber receives. This is the critical difference from the XQ+85MP01D SR4: SR4 uses four separate fiber strands per direction (requiring MTP/MPO-12), while LR4 multiplexes four wavelengths onto a single fiber strand per direction (requiring only a standard Dual LC duplex patch cord). Any existing OS2 single-mode Dual LC infrastructure — the same fiber used for 1G/10G SFP+ single-mode transceivers — is directly compatible with the XQ+31LC02D.
**2km reach — the campus inter-building distance tier**
At 2km on OS2 single-mode fiber, the XQ+31LC02D covers:
- **Campus inter-building links:** Main data centre to satellite buildings within a 2km radius — MDF-to-IDF connections across a university campus, hospital complex, or multi-building industrial site.
- **Metro short-haul:** Street-level connections between adjacent blocks or a data centre to a nearby PoP within 2km of installed single-mode fiber.
- **Building-to-building in dense urban environments:** Where rooftop-to-rooftop or conduit distances between buildings are measured in hundreds of metres to 2km.
The XQ+31LC02D covers the 100m–2km gap that neither the XQ+85MP01D (limited to 100m multimode) nor the XQ+31LC10D (10km, priced for long-haul) addresses cost-efficiently. At USD 229.00 versus USD 349.00 for the LR4 10km version, the 2km variant saves USD 120.00 per transceiver (USD 240.00 per link pair) for deployments that genuinely need only 2km reach.
**Hardened for harsh environments — +70°C, humidity, EMI**
MikroTik explicitly certifies the XQ+31LC02D for harsh deployment conditions: "designed to meet the harshest conditions, including temperature, humidity, and EMI interference." Operating to +70°C and rated for high humidity and EMI environments — the same ruggedisation standard as MikroTik's outdoor device line. For a campus link where the transceiver may be installed in a poorly ventilated IDF closet, an outdoor-rated enclosure, or a hot aisle rack without active cooling, the +70°C operating ceiling provides operational safety margin.
**Digital diagnostics — optical power monitoring in RouterOS**
Built-in DDM/DOM reports received and transmitted optical power to the host device, accessible in RouterOS interface monitoring — consistent with the XQ+85MP01D and XQ+31LC10D. Gradual received optical power decline indicates fiber degradation, connector contamination, or excessive bend radius before link failure, enabling scheduled maintenance over reactive outage response. MTBF ~200,000 hours at 25°C — double the XQ+85MP01D's 100,000-hour MTBF, reflecting single-mode fiber's lower susceptibility to multimode degradation mechanisms.
**Cross-sell note for wirelessnetware.ca:** The XQ+31LC02D completes the five-tier 100G interconnect family. Update all CCR2216, CRS504, CRS510, and CRS518 product pages with the full five-tier comparison:
- *"Same-rack copper 1m — XQ+DA0001 (USD 39.00)"*
- *"Same-rack copper 3m — XQ+DA0003 (USD 59.00)"*
- *"Short-reach 100m multimode fiber — XQ+85MP01D (USD 89.00)"*
- *"Mid-reach 2km single-mode fiber — XQ+31LC02D (USD 229.00)"*
- *"Long-reach 10km single-mode fiber — XQ+31LC10D (USD 349.00)"*
**5-year software support note:** Not applicable — optical transceiver module, no RouterOS firmware component.
**Canadian market note:** No certifications listed — optical transceiver module, no wireless transmitter, no AC mains input. No ISED wireless advisory applies. Confirm RoHS compliance with distributor for Canadian commercial sale.
Key specifications:
- **Product code:** XQ+31LC02D
- **Format:** QSFP28
- **Data rate:** 100G (4× 25G)
- **Standard:** 100GBASE-LR4
- **Fiber mode:** Single-mode (OS2)
- **Connector:** Dual LC UPC
- **Wavelengths:** 1271nm, 1291nm, 1311nm, 1331nm (LAN-WDM)
- **Reach:** 2km
- **Operating temp:** Up to +70°C
- **Digital diagnostics:** Optical power monitoring (DDM/DOM)
- **MTBF:** ~200,000 hours at 25°C
- **Compatible devices:** CCR2216, CRS504-4XQ-IN/OUT, CRS510-8XS-2XQ-IN, CRS518-16XS-2XQ-RM
- **Certifications:** None listed (optical module)
- **Suggested price:** USD 229.00
- Product code
- XQ+31LC02D
General information
All students who attend the Training can receive a free L4 license from MikroTik. Training should be at least three days long.
Students are allowed to take the certification test ONLY upon the attendance of individual training course, in the class, under the supervision of a MikroTik Certified Training Partner.
Each certification test consists of a pre-defined % of random questions (multiple choice and true/false) from specific question categories. Items also have a difficulty parameter. MTCNA test is generated from more straightforward questions, Advanced tests – from more difficult questions.
Only one attempt is allowed. The test must be finished within one hour. The passing grade is set to 60%. There are 25 questions in the exam.
Certificate numbers and RouterOS L4 licenses are assigned automatically by MikroTik. Students can see their certificates and generate license keys once logged into the account server. Printed documents from MikroTik cost USD 30 per piece. Shipping is not included.
Remote training sessions and certification exams are not allowed.
MikroTik Certification Test without prior attendance of particular MikroTik Training Session is not allowed.
Wireless Netware offers every participant a free RouterBOARD hAP-ac-lite.
The price includes class attendance, course materials, coffee breaks and lunch, "Only for local Training." The amount does not cover travel and accommodation expenses.
Please bring (very important): Laptop, power extension strip (10ft./3m) with five sockets, one long Ethernet cable (16ft./5m+) and several short Ethernet cables.
Cost: Early bird price for the course is $850. It is valid 15 days before the scheduled session, referring to the MikroTik Training website. The price will be $1050 after the early bird date. The price includes class attendance, course materials, coffee breaks and lunch," Only for local Training." The amount does not cover travel and accommodation expenses. Seating is limited to only four students. The seat is reserved and guaranteed just after the payment is received in full amount.
Certificates will only be valid for three years.
Become a consultant: It's simple if you have MTCNA (score 75%+) and at least one valid MikroTik Engineer level certificate (MTCRE, MTCWE, MTCTCE, MTCUME or MEDICINE) with score 75%+, apply by email with your mikrotik.com account name and fields of expertise and MikroTik will add you to the list. To stay on the consultant list, you will have to have valid certificates, participate in the MikroTik Forum and attend the ...M.U.M. events in your country conducting RouterOS case studies or workshops for the rest of the attendees.
By purchasing any of "Training Courses," you signify your agreement to these terms and conditions. If you do not agree to these Terms and Conditions, do not use this Site or Service. *WNT may modify this ...T.O.C. at any time and such changes will be effective on the date that such modified ...T.O.C. is posted on this Site. Use of the Site or Service after such changes have taken effect constitutes acceptance of all changes. Training classes, courses, and workshops may be subject to additional notices, class/course descriptions and policies (collectively "Additional Terms"), all of which are made part of this ...T.O.C. by this reference. If there is any conflict between this ...T.O.C. and Additional Terms posted for or applicable to a specific part of Sites such as training course description, the latter supersedes concerning using that particular part of the Site or accurate Service, please read these terms carefully, and keep a copy of them for your reference.
Returns:
All returns to WNT LTD. are handled as exchanges or store credit toward a future purchase. All returns must have a valid ...R.M.A. Number. To request an ...R.M.A. number, log into your account and select. ...R.M.A. from the options menu at the left of your screen. Identify the order and the product you wish to ...R.M.A. and follow instructions on the screen. Once your ...R.M.A. request is received, our ...R.M.A. The team will review your application and respond within two business days or sooner. All products returned for an exchange or store credit must be returned within 30 days of the invoice date. Defective products received by the customer as ...D.O.A. must be reported within seven days. Shipping errors, such as incorrect quantities or incorrect product received, must be reported within seven days. Products purchased from our Clearance Sale, Overstock, Open Box or Special Order (...S.P.O.), or non-stocked items, or custom-assembled products, cannot be returned or exchanged. Order shipments, which arrived damaged, must have a completed. "Damage Parcel Report" with ...U.P.S., USPS, or DHL. All products being returned must be shipped pre-paid. Returns sent C.O.D. will not be accepted and returned to the shipper at the customer's expense. If the repair is under warranty, WNT LTD. will return the product to the customer, within Canada-Post, using Standard Service at no charge. Expedited shipping methods, international shipping costs, customs fees, and duties are the customer's sole responsibility. For non-warranty returns, the customer is responsible for all related shipping costs. All products being returned for store credit must be in the original box with all accessories, warranty cards and instructional sheets, and new, unused condition with the factory seal intact. We do not accept returns for products that have been opened or have missing parts, manuals, warranty cards, or damaged when returned (unless it's ...D.O.A.). A 25% restocking fee will apply. To ensure that the product remains in returnable condition, do not use the product box as the shipping box. You must repackage in another box with appropriate packing materials. Products arriving in a product box will be returned to the shipper at the customer's expense. The customer is responsible for adequately packaging the products returned. Contents of the package not matching the information on the ...R.M.A. form will be cause for the return of ALL equipment.
