4-12 Chapter 4Business Feature PackageDirect Trunk SelectionEach station can be allowed access to or denied access from a trunk or trunk group by access codewhen LCR is activated. When restricted, the station user must use a trunk key or a route key.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, system speed dial number and entry in the DIDtranslation table may be assigned a name (maximum 11 characters). These names are displayedduring calls with these ports and in the case of station and speed dial names, can be used to originatecalls. See the Dial by Name feature (Station Features).Disa SecurityTelephone fraud and long distance theft are a serious concern. The iDCS 500 provides a strong DISAsecurity system. If an incorrect DISA passcode is entered repeatedly (as is the case with “hackers”),the DISA system can be automatically disabled temporarily. Both the number of incorrect passcodeattempts and the time that DISA is disabled are programmable. In addition, all failed attempts toaccess DISA print on SMDR (if provided) with a “DE” DISA error flag.Distinctive RingingA user knows the type of call received by the type of ring heard. Outside calls have a single ringrepeated while internal calls have a double ring repeated.In addition any trunk or station can be programmed to ring a keyset with a predefined ring tone (1–8)or a single line port with a predefined cadence (1–5) selection. This provides for easy identificationof special lines or extensions that ring your phone.Door Lock Release (Programmable)After answering a call from the door phone, users can dial a code to activate a contact closure. Thiscan be used to operate a customer-provided electric door lock release mechanism. The contactclosure timer is programmable from 100–2500 ms.Door PhonesThe door phone interface module (DPIM) provides for connection of a door phone to a DLI port.Pressing the button on the door phone produces a distinctive ring (three short rings repeated) at theassigned station or station group. If not answered within a programmable time, the system releasesthe door phone and stops the ringing. Stations may call the door phone directly and monitor thesurrounding areas. Door phones follow the system ring mode plan.E & M Tie LinesYour office can be connected to another office with a tie line. Use it to make calls to stations in theother system. If programming allows, you can access lines in the other system to make outside calls.Tie line calls can be put on hold, transferred and conferenced in the same way as are other outsidecalls. Users accessing the tie line from the other system can get a line in your system and makeoutgoing calls. These calls can be controlled by assigning a dialing class to the tie line. Your localtelephone company may use E&M tie lines to provide DID service. In this case these tie lines can beprogrammed to follow the DID translation table. See DID. Translated E & M tie line calls haveTime-based routing capabilities.