A 889Programming Operations GuideasynchronousA method of transmission where the time intervals between characters are not required tobe equal. Signals are sourced from independent clocks with different frequencies andphase relationships. Start and stop bits may be added to coordinate character transfer.ATA2The Analog Terminal Adapter (ATA2) connects analog telecommunication devices, suchas fax machines, answering machines, and single line telephones, to a digital media baymodule on the Business Communications Manager system. Refer to “Determining analogsettings” on page 424.autobumpingA feature that determines how the system handles new Call Log items when your Call Logis full. When Autobumping is on, the system deletes the oldest entry when there is a newlog entry. If Autobumping is off, your system does not log calls when your log is full. Thisfeature is set by the user at the telephone.auto dialA memory button that provides one-touch dialing of external or internal numbers oraccesses features. Internal autodial buttons with indicators, display a solid indicator whenthat telephone is busy. In BCM 3.5 and newer software, Answer DNs can act as auto dialbuttons for internal telephones.Auto DNThis is a system directory number that is assigned to auto-answer trunks that are used toallow remote users to call into the system. On these trunks, the callers do not enter apassword, but directly access the system. From a security perspective, ensure that thesetrunks have adequate restrictions (Remote Access Packages) to prevent unauthorizedsystem usage. See also DISA DN.auto holdA feature that automatically places an active call on hold when you select another line toanswer or make a call. This feature can also be activated by the user with FEATURE 73,if the feature has not been allowed on the telephone record (Capabilities). See also fullautohold (on idle line).auto log optionsA feature that allows you to select the type of calls stored in your Call Log. You can logcalls not answered, calls not answered at this telephone but answered in the system, allcalls answered and not answered at this telephone, or no calls. This option is set underUser Preferences. (Services, Telephony Services, System DNs)
