Draytek 5500 Series Note: CTCH means you can acquire anti-spam service from Commtouch.

VigorPro5500 Series User’s Guide
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6. From the Device’s Service section, click the Activate buttons for AS (Anti-Spam)
service.
7. In this page, check the box of “I have read and accept the above Agreement”. The
system will find out the date for you to activate this version of service. Then, click
Register.
Note: CTCH means you can acquire anti-spam service from Commtouch.
8. Next, the DrayTek Service Activation screen will be shown as the following.