4-20 Chapter 4 Basic FeaturesMaking Outside (External) CallsCalling Outside Lines—an OverviewOutside calls are made via central office (C.O.) lines. To call an outside numberyou first need to press a programmed line button or line group button or dial theC.O. line access code (‘9’ for example). If you have an LCR button (for least costrouting) you should press that. Ask your system administrator what is set up foryour phone.You may also be asked to enter an account and/or authorisation code in order to beable to make a call (or you may choose to enter a code voluntarily). These aredescribed next.If you try to make a call if there are no available Call buttons, you will hear NoMore Calls tone instead of ringing tone and you cannot complete the call.Authorisation Codes and Account CodesAccount codes ensure your call is charged to the proper account or department.Authorisation codes ensure you are authorised to make outside calls. You may berequired to enter a code before a call can be made (these are referred to as “forced”codes), or you may voluntarily enter a code before or during a call.Entering Account CodesIf you are asked to enter an account code when you select an outside line, press theprogrammed [ACC] button or the soft button for the ACCT option on the LCDpanel. Enter the code using the dial keys. To voluntarily enter a code before makinga call or during a call, press the [ACC] button or dial [4] [7] and enter a valid code,press the [ACCT] button again.