How do I know if my ACN VoIP service is unavailable?
IRIS V: If the left LED on your Videophone is flashing blue then your VoIP service is not available.
IRIS X: On the right hand side of the main screen of the device your phone number will be displayed in green if the device is registered. If your device is unavailable your phone number will appear in grey.
Grandstream HT-701 ATA: When all 4 LEDs on the ATA are lit the device is registered. Therefore if any one of the lights is not lit the VoIP service is unavailable.