This guide relates to the Grandstream HT801 Phone Adapter which looks like the following:

This has three diagnostic lights.

This guide will tell you what these lights mean so that you may determine the cause of any issues you are experiencing.

Power Light 

This shows the status of the power to the Grandstream Phone Adapter.

If...

• The power light is flashing

This indicates that the Grandstream Phone Adapter is turning on.

• The power light is off

This indicates that there is no power to the Grandstream Phone Adapter.

• The power light is on

This indicates that the Grandstream Phone Adapter is powered on.

Internet Light 

This shows the status of the Grandstream Phone Adapter's connection to the network.

If...

• The Internet light is flashing

This indicates that the connection is being used to send or receive data.

• The Internet light is off

This indicates that the Grandstream Phone Adapter is not connected to the network.

• The Internet light is on

This indicates that the Grandstream Phone Adapter is connected to the network.

Phone Light 

This shows the status of the phone service configured on the Grandstream Phone Adapter.

If...

• The phone light is flashing quickly

This indicates that the phone is off the hook and/or in use.

• The phone light is flashing slowly

This indicates that there is a voicemail message.

• The phone light is off

This indicates that your phone service is not communicating back to us correctly or that the configuration for this is not present on the Grandstream Phone Adapter.

• The phone light is on

This indicates that your phone service is communicating back to us and is ready for use.