First of all im working in a big hospital. Doctors have a GSM a Dect and a Ipac. I have testing the P910 from ericsson and i must say this is great. Its not just a mobile extension but have alot more. It have all te PABX futures when you dail a 9 on the GSM you get the operator from your company you can dail al the short numbers from your number plan and it will connect. Intresting MAIL ME