Uniden VG-100 Owner's Manual page 37

As you can see in the screenshot above, when forwarding is enabled, the driver will disable
the computer's ability to go to standby mode. When the computer tries to go into a standby
mode, you will see the following popup:
If the computer goes to sleep, then toll bypass will not work. To turn this feature off, If the
computer goes to sleep, then toll bypass will not work. To turn this feature off, uncheck the
"Disable Standby/Hibernate" check box.
When call forwarding is enabled, incoming callers will hear a voice message indicating that
the call is being forwarded. This let's the incoming caller know what is transpiring.
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