The OBiTALK configuration facility forces Speed Dial #1 to be your OBiON number, whether you use it or not. I think it also adds Speed Dials for any other devices you add (why would you want a Speed Dial to your own OBi number?). You can delete all but the first one at the OBiTALK configuration facility. If you stop using the OBiTALK configuration facilty and configure your OBi manually (Auto Provisioning must be disabled), Speed Dials (and everything else) will be totally under your control.