My friend has a BT4600 cordless phone and she is driving me insane to lengthen the ring tone as it stops ringing and starts asking the caller to leave a message, before she can answer it I have searched the handset to lengthen the ring tone to no avail, and can find no information in the handbook.
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Page 56 of the user manual, you can set up to 10 rings.
Posted with device: google_chrome_93
Thank you Keith followed your instructions and got a result.
Excellent 😀
I have the same phone.