17
Troubleshooting
Appendix
System does not receive caller ID when on a call.
Make sure you subscribe to caller ID with call waiting features 
from your telephone service provider. Caller ID features 
work only if both you and the caller are in areas offering 
caller ID service, and if both telephone service providers use 
compatible equipment.
I subscribe to a nontraditional telephone service that uses  
my computer to establish connections, and my telephone  
doesn’t work.
Make sure your computer is powered on.
Make sure your Internet connection is working properly.
Make sure that the software is installed and running for your 
nontraditional telephone service. 
Make sure to plug your USB telephone adapter into a dedicated 
USB port on your computer. Do not plug it into a multiple port 
USB hub (USB splitter) that is not powered.
In a few rare instances, the USB port on your computer may 
not have enough power. In these instances, try using a USB hub 
with its own external power supply.
If you are using a firewall, it may prevent access to your 
nontraditional telephone service provider. Contact your service 
provider for more information.
•
•
•
•
•
•
•