ZyXEL Communications XS3800-28, User Manual, Page: 752 / 789

XS3800-28 User’s Guide
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PPENDIX
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Customer Support
In the event of problems that cannot be solved by using this manual, you should contact your vendor. If
you cannot contact your vendor, then contact a Zyxel office for the region in which you bought the
device.
For Zyxel Communications offices, see https://service-provider.zyxel.com/global/en/contact-us for the
latest information.
For Zyxel Networks offices, see https://www.zyxel.com/index.shtml for the latest information.
Please have the following information ready when you contact an office.
Required Information
• Product model and serial number.
• Warranty Information.
• Date that you received your device.
• Brief description of the problem and the steps you took to solve it.
Corporate Headquarters (Worldwide)
Taiwan
• Zyxel Communications Corporation
• https://www.zyxel.com
Asia
China
• Zyxel Communications (Shanghai) Corp.
Zyxel Communications (Beijing) Corp.
Zyxel Communications (Tianjin) Corp.
• https://www.zyxel.com/cn/zh/
India
• Zyxel Technology India Pvt Ltd.
• https://www.zyxel.com/in/en/
Kazakhstan
• Zyxel Kazakhstan
• https://www.zyxel.kz