I have a TD21 doorbell set up, with the app enabled on three devices - 2 x iphones and an ipad.

1) Is there a way of setting notifications, so that it only sends notifications to one of the phones and not the other two devices, however allowing the other devices to see live footage, without having to re-log in?

2) The two iphones currently receive a text notifcation of movement or the bell being pressed, whilst the ipad receives no text notifications of anything.  However, when the doorbell is pressed, the ipad continues to ring until the "call" is answered or rejected (the phones don't).

a) A setting on the ipad obviously prevents text notifications - what is this? Can it be set on one of the iphones?

b) How can the ipad be prevented from "ringing" at all, since the phones don't?