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Industrial Switch Access Point OEM / ODM IoT Solution NMS
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After-Sales Service

WARRANTY & REPAIR

Sino-Networks stands behind every product we ship. Our dedicated support team ensures your devices keep running at peak performance.

Our Commitment

WARRANTY POLICY

Sino Networks provides the following standard warranty coverage:

  • Industrial Ethernet Switches — 5-Year Warranty
  • Standard Outdoor PoE Box Systems — 5-Year Warranty
  • SMB & Enterprise Ethernet Switches — 3-Year Warranty

The 5-year warranty for a standard Outdoor PoE Box covers the complete system supplied by Sino Networks, including the industrial switch, power supply, surge protector, circuit breaker, and enclosure.

Batteries, consumables, optional accessories, and third-party components follow the terms stated in the quotation or sales agreement.

Coverage begins from the shipment date for orders confirmed on or after January 1, 2026.

If a product issue occurs, our technical team will first assist with remote troubleshooting. Products confirmed to have manufacturing defects will be repaired or replaced under warranty.

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Terms & Conditions

WARRANTY DISCLAIMER

  • Warranty coverage applies to defects in materials, manufacturing, or assembly under normal operating conditions. A valid product serial number and relevant purchase or order information may be required.
  • Products must be installed and operated in accordance with the applicable datasheet, installation guide, and specified electrical and environmental limits.
  • The warranty does not cover damage caused by misuse, accidents, improper installation, incorrect power input, unauthorized modification, or inadequate maintenance.
  • The warranty does not cover normal wear, cosmetic damage, or damage caused by external events exceeding the product’s stated environmental or protection ratings.
  • Batteries, consumables, separately purchased accessories, and customer-specified third-party or non-standard components are covered only when stated in the applicable quotation, invoice, or sales agreement.
  • Sino Networks will inspect and evaluate returned products before confirming warranty coverage. To the extent permitted by applicable law, warranty remedies are limited to repair or replacement and do not include indirect or consequential losses.
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Step-by-Step Process

HOW TO RETURN DEVICES UNDER WARRANTY

Follow these five steps to submit a warranty claim. Our support team will assist you throughout the review, troubleshooting, and return process.

1
SUBMIT RMA REQUEST
Complete the RMA form below with your company, product, purchase, and fault information.
↓ Form available below
2
AWAIT REVIEW
Our support team will review your request. The typical response time is 1–2 business days.
3
COMPLETE REMOTE TROUBLESHOOTING
Follow the troubleshooting instructions provided by our engineers. You may be asked to provide photos, videos, configuration files, or test results by email.
4
RECEIVE CONFIRMATION
If a product return is required, you will receive an approved RMA number, return instructions, and the designated shipping address by email.
5
SHIP DEVICE
Pack the approved device securely, include the required RMA documents, and ship it according to the instructions provided.

PACKAGING

  • Pack the device securely using its original packaging or equivalent protective materials whenever possible.
  • Return only the approved device or components unless our support team specifically requests additional accessories.
  • Print the approved RMA form, place one copy inside the package, and clearly display the RMA number on the outside.
  • Ensure that the returned product is adequately protected against impact, moisture, and other transportation risks.

SHIPPING

  • Do not return any product before receiving an approved RMA number.
  • Ship the product only to the address provided in the RMA confirmation.
  • Use a trackable shipping service and retain the tracking number and shipping receipt.
  • Before shipment, Sino Networks will confirm the required documents and applicable shipping and customs responsibilities in writing. Sino Networks is not responsible for loss or damage caused by inadequate packaging or an untrackable shipping service.
Online Submission

RMA REQUEST FORM

Submit your Return Merchandise Authorization request online. Our support team will review and respond within 1–2 business days.

Contact Information
Product Information
If available, this helps us process your request faster.
Fault Description
Get in Touch

SUPPORT CONTACT INFORMATION

Choose the most relevant option below for technical assistance, warranty service, product inquiries, or partnership support.

Technical Support
TECHNICAL HELPDESK
For product configuration, troubleshooting, firmware support, compatibility questions, and technical documentation.
info@sino-networks.com
Please include the product model and a brief description of the issue in your email subject.
Typical response time: 1–2 business days
Warranty & Repair
WARRANTY & RMA SUPPORT
For warranty claims, product returns, and repair service requests. Please submit the RMA form above before shipping any product.
Submit the RMA Request Form above
Typical response time: 1–2 business days
The return address will be provided after RMA approval.
Sales & Partnerships
SALES SUPPORT
For product inquiries, quotations, OEM/ODM cooperation, customized solutions, and partnership opportunities.
info@sino-networks.com
+86 173 2895 9642
Mon–Fri: 09:00–18:00 (UTC+8)
Need More Help?

CAN’T FIND WHAT YOU’RE LOOKING FOR?

Need a product datasheet, user manual, configuration guide, or additional assistance? Tell us the product model and what you need, and our team will help you find the right information.