sebke, welcome to the forum.
The first part of your question can be achieved using this method:
Single stage dialling:
http://www.obitalk.com/forum/index.php?topic=1103.msg6932#msg6932The second part of your question, using your cell phone, can be included in single stage dialling if you are willing to use the OBiON app on your cell phone. The app does have some limitations. You may also wish to look at “Trusted Callers”. This can give your cell phone access to the auto attendant of any of your OBi110s.
Trusted Caller:
http://www.obitalk.com/forum/index.php?topic=3094.msg20656#msg20656