@educ8ian wrote:
Telephone now connected to IP network via a new Virgin Media router. Phone now connected as part of a telephone and TV package only (ie not broadband enabled as I'm not a broadband user).
Now if a caller rings me when I am on the phone, they no longer seem to get an engaged tone and my answerphone fails to cut in (ie they assume I'm out and that I've switched my answerphone off accidentally).
Is this all part of what providers might call an 'upgrade in service' or can this issue be resolved with a simple technical fix?
If you have been moved over to the 21CV connection, have you had 'call waiting' enabled on the line as a standard feature as advertised in the switchover web page?
If another call comes in, while you are on the phone, you would hear a beeping sound to tell you another call is coming in.
Have a look at page 11 in the home phone manual
https://store.virginmedia.com/content/dam/eSales/Downloads/Phone%20User%20Guide.pdf
I think you are in purple zone when you are on 21CV. It says you can't have voicemail and call waiting on at the same time.
Use the suggested settings to see if call waiting is active on the line and see if you can turn it off.
See if engaged tone and voicemail then return for incoming calls when call waiting is off.