Defining the System DN headings 371Programming Operations GuideThe System DN heading provides access to the DN records of telephones that are active on thesystem, records of all the DNs that are available, and a comprehensive list of all DN possibilities.Use the list that is most convenient for what you want to do.Figure 117 System DNs main headingsThe two sides of a DN recordThere are two sides to DNs that affect system telephones and equipment.1 On the system side, each telephone or telephony-based device on the network is assigned a DNnumber, which identifies it to the system. DNs for digital telephones map to each wire pair ona station media bay module, this includes the 7XXX digital phones.ISDN, and the legacy DECT, and Companion systems also require media bay modules tooperate. However, they have a specific set of DNs that are not mapped directly to thehardware. Refer to table entry: Active Companion DNs on page 373 and table entry: All ISDN/DECT DNs on page 374.The 20XX IP telephones and the WLAN IP telephones do not use media bay modules becausetheir connections occur over the internet and directly through the Media Services Card (MSC)within the Business Communications Manager hardware. However, the system uses DNrecords from the digital range to identify these telephones because their functionality closelymirrors the digital telephones.As well, certain applications running on the Business Communications Manager are assignedDNs, so that the system can access the application functionality. These would include directinward access (DISA) DNs, and DNs for CallPilot access. Refer to table entry: Activeapplication DNs on page 373.When you initialize your system with the Quick Start Wizard, you will be asked to specify aDN length and a Start DN.System DNsActive set DNsDN XXX-XXXGeneralLine AccessCapabilitiesUser PreferencesRestrictionsTelco FeaturesActive Companion DNsDN XXX-XXXActive application DNsDN XXX-XXXInactive DNsSet DNsCompanion DNsAll Inactive DNsSystem DNs (continued)All ISDN/DECT DNsDN XXX-XXXAll System DNsDN XXX-XXXAll System B2sDN RegistrationActive DNs reg’dDN XXX-XXXInactive DNs reg’dDN XXX-XXXAll DNs reg’dDN XXX-XXXDNs avail for reg’nDN XXX-XXXSystem DNs (continued)IP set DNs reg’dActiveInactiveVoice Port DNs reg’dActiveInactiveIP Wireless DNs reg’dActiveInactiveCTE mediaDNs reg’dActiveInactiveOAM DN reg’dDN XXX-XXX
