Installation and commissioning76 Aastra 620deud-1094/1.3 – I7.9 – 02.2010USB and external charging socket■ Mini USB connectionThere is a mini USB socket (2.0) in the bottom right-hand corner. You can use it as a connectionsocket for a USB charging bay, for instance for charging the phone. However the charging proc-ess is slower than when the phone is charged in the charging bay.Use a screened USB cable only.Logging your phone on■ Registering your phone on the systemYour system administrator has to prepare the system before you can log on your phone.Your phone can be operated on a maximum of 4 different communication systems. To do so, itmust be registered on each system. As a rule your phone is registered with the communicationsystem by your system administrator. Contact your system administrator for more information.■ RegistrationA registration is stored on the phone for each communication system with which your phone isregistered. A registration entry contains, among others, a system name (e. g. A, B, C).If your phone is registered with several systems, the name of the active system is shown on thedisplay.■ RegisterOnce the phone is registered with one or more communications systems, you can make andreceive phone calls (see also Chapter "Managing communication systems", page 62).