AT&T CL2940 Quick Start Manual page 25

Big button/big display telephone with speakerphone/caller id/ call waiting
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Troubleshooting
The telephone does not receive caller ID or the telephone does not
display caller ID during call waiting.
Make sure you subscribe to caller ID with call waiting features provided by
the telephone service provider.
The caller may not be calling from an area that supports caller ID.
Both your and the caller's telephone service providers must use equipment
compatible with caller ID service.
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 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.
Common cure for electronic equipment:
If the telephone is not responding normally, try resetting the telephone. Do
the following in the order listed:
1.
Disconnect the telephone line cord from the telephone base.
2.
Remove the batteries.
3.
Wait a few minutes before connecting the telephone line cord to the
telephone base.
4.
Replace the batteries.
5.
Wait for the telephone to synchronize its connection. This may take up to
one minute.
23

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