It appears you turned off ringing.
To turn it on, have your wife go to page 4-46 on the manual hereClick me to view
You will want to return the ring group to normal.
The quick guide is to
Enter 2 to select CO 2
Press until it says enable
Then press to select the next extn and press to enable and repeat until you have enabled all extensions
Then press to save and to exit
You need to do this on the phone connected to extension jack 1, and this is assuming the programming code hasn't been changed from the default 1234
It will then return to normal operations.
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