4.3. SYSTEM CAPACITY4.3.1. Maximum Trunk nd Extension CardsThe following number of trunk and extension cards can be installed in the main unit (Hybrid IP-PBX) for expansion.Card Type KX-TDA200Trunk Card *1 8Extension Card 8Total 10*1 One T1, E1, PRI30 and PRI23 card counts as 2 cards.Note:· For each card, a maximum number that can be installed in the main unit (Hybrid IP-PBX) is listed in "Installation Manual".· Any card that exceeds the capacity of the main unit (Hybrid IP-PBX) will be ignored.· When the main unit (Hybrid IP-PBX) starts up with an invalid configuration mode, some cards will be ignored.4.3.2. Maximum Terminal EquipmentThe following number of terminal equipment can be supported by the main unit (Hybrid IP-PBX).Terminal Equipment Type KX-TDA200Telephone *1 128CS 32PS 128Voice Mail 2Doorphone 16Door Opener 16*1 When only T76xx series and T7560, T7565 DPTs and SLTs are connected. If other DPTs or APTs are connected, themaximum number will decrease as each of these units is counted as 4 sets of SLTs or DPTs (T76xx series and T7560, T7565).4.3.3. Power Supply Unit SelectionMain unit (Hybrid IP-PBX) needs an optional power supply unit (PSU) suitable for its configuration. Calculate the amount of"load figures" from the type and number of equipment to be connected, and determine the type of PSU that will be required.Load Figure CalculationEquipment Type Load FigurePT DPT (T76xx series and T7560, T7565) 1Other DPT/APT/DSS Console 4Extension Card *1 DHLC8 8SLC8 8SLC16 16MSLC16 16CS 4ISDN Extension 2Voice Mail 1*1 Only the extension cards that can support SLTs count for the load figures.PSU CapabilityEach PSU supports a different amount of load figures.PSU Type Maximum Load FiguresPSU-M *2 128PSU-L 512*2 Available for the KX-TDA100 and KX-TDA200.7KX-TDA200BX