DCS Compact II General Description Chapter 4. Features4-10Outside lines may be programmed to bypass the operator(s) and ring directly atany station or group of stations.Direct Inward System Access (DISA)Users can call in on specific DISA lines at any time, input a security code andreceive system dial tone. Users can now place internal calls or, if permitted, callsusing C.O. lines. The caller must have a tone dial phone and must know his/herDISA security code. DISA lines can be used as both–way lines or incoming onlyand may be active in day mode, night mode or both. The C.O. lines used forDISA must have disconnect supervision.Direct Trunk SelectionEach station can be allowed access to or denied access from a trunk or trunkgroup by access code.Directory NamesEach station, station group and C.O. line may be assigned a directory name(maximum 11 characters). In addition, each personal speed dial number, systemspeed dial number and entry in the DDI translation table may be assigned aname (maximum 11 characters). These names are displayed during calls withthese ports and, in the case of station and speed dial names, can be used tooriginate calls. See the Dial by Name feature (in Station Features).DISA SecurityTelephone fraud and long–distance theft continue to increase; therefore, we haveintroduced a DISA security system. If an incorrect DISA passcode is enteredrepeatedly (as is the case with “hackers”), the DISA system can be automaticallydisabled temporarily. Both the number of incorrect passcode attempts and thetime that DISA is disabled are programmable. In addition, all failed attempts toaccess DISA will print on SMDR (if provided) with a "DE" DISA error flag.Distinctive RingingUsers will know the type of call received by the type of ring heard. Outside callshave a single ring repeated while internal calls have a double ring repeated.