When we want to send a call directly to the voicemail box for an extension: we all know we can do this by using the * (in front) of the extension number.
For example: *101 (or) *102
All extensions involved have voicemail boxes
Why is it that we can use the * (for some extensions) and reach their VM box without ringing the phone, but when we try using it for others: we are getting the system error: