System Components 3System ComponentsSystem Components TableModel DescriptionShelf KX-TD500KX-TD520Basic ShelfExpansion ShelfExtensionCardsKX-T96170KX-T96172KX-T96174KX-T96175KX-T96185KX-TD50170KX-TD50172KX-TD50175HLC (Hybrid Line Circuit) CardPLC (Proprietary Line Circuit) CardSLC (Single Line Telephone Circuit) CardSLC-M (Single Line Telephone Circuit with Message Waiting) CardOPX (Off Premise Extension) CardDHLC (Digital Hybrid Line Circuit) CardDLC (Digital Proprietary Line Circuit) CardESLC (Enlarged Single Line Telephone Circuit with MessageWaiting) CardTrunk Cards KX-T96180KX-T96181KX-T96182KX-T96182CEKX-T96182DKX-T96183KX-T96184KX-T96187KX-T96188KX-T96189KX-TD50180KX-TD50288KX-TD50290LCOT (Loop Start Central Office Trunk) CardGCOT (Ground Start Central Office Trunk) CardDID (Direct Inward Dialling Trunk) CardDID-MFC (Direct Inward Dialling Trunk with MFC) CardDID-2W (Both-way Direct Inward Dialling Trunk) CardRCOT (Loop Start Central Office Trunk with Polarity ReversalDetection) CardE&M CardT1 Digital Trunk CardE1 Digital Trunk CardPCOT (Loop Start Central Office Trunk with Pay-Tone Detection)CardELCOT (Enhanced Loop Start Central Office Trunk) CardBRI (ISDN Basic Rate Access Interface) CardPRI30 (ISDN Primary Rate Access Interface) CardResourceCardsKX-T96191KX-T96193KX-T96196KX-TD50197DISA (Direct Inward System Access) CardAGC (Automatic Gain Control) CardRMT (Remote Circuit) CardERMT (Enhanced Remote Circuit) Card
