Hello,

The Grandstream HT502 doesn't have "registration" lights. The only time the phone lights illuminate is when it is provisioning, registering, ringing, or when the phone is in use in some way.

We are researching the issue. It seems that GrandStream has it as a default and it might not be configurable via provisioning.

Please send an email to support@voipo.com if you are experiencing this issue, ATTN: Daniel in the subject line so that we can test a new provisioning file with you to resolve the "phantom dialtone without registration".

Regards,
Daniel