36Time ControlThis feature cannot be used with a SIP terminal.Several time groups can be configured in the OpenCom 100 / Aastra 800. Dependingon the activated time group, incoming calls are signalled on different terminals. It ispossible to automatically change between these time groups, according to a time-table set up by the system administrator, or to change them manually.You can only program this function if the system administrator has activated the“Time control” authorisation for your user group.Activating automatic time controlH*8#This key combination activates automatic time control. The setting remainsunchanged until one of the available time groups is set manually.Manually setting a time groupH*8* Z (number of the time group, e.g. 1) #You activate the required time group using this procedure; automatic time control isthen deactivated. Ask your system administrator about the number of configuredtime groups.Deleting All Call Forwarding in the ExchangeThis feature cannot be used with a SIP terminal.H*184 Z (system PIN) #Call forwarding can be set up in the network operator’s exchange. For setting up newcall forwarding or finding faults, it can be useful to delete all active call forwarding inthe exchange. Using the above code-number procedure, you can do this from any tel-ephone.Deleting the call forwarding in the exchange is a background function. After youentered the procedure this process will take time (up to 15 seconds for each line).Please have patience with this.The system PIN is issued by the system administrator. It must have been changedfrom the factory setting “0000” valid on delivery to another value.