Expansion Stages and System Capacity78 Aastra 415/430 as of R3.2syd-0344/1.6 – R3.2 – 09.2014TipWith the planning application Aastra Plan the power supply available forterminals is checked automatically.Overload shutdownIf the rated power is exceeded the power supply is disconnected. It is restored afterapprox. 20 s.If an overload occurs, reduce the required supply power (e.g. by powering DECT ra-dio units and/or system phones locally).3. 4. 5. 2 Power supply per terminal interfaceThe power supply per terminal interface is determined by the interface type. Theinterface load depends on the following variables:• Terminals used incl. auxiliary devices• Bus configuration• Line length and conductor cross-sectionFor information on the calculations refer to "Terminal interfaces", page 114.Alphanumerical keyboard (AKB) 1) Office 35, Office 45 20ISDN terminal BRI-S interface approx. 500 6)Analogue terminals FXS interface approx. 5001) Although no longer available, the phone is still supported.2) An Aastra M535 always requires a power supply unit3) The value applies to radio units with hardware version "-2". The value for hardware version "-1" is 300 mWlower.4) The value applies to each interface and to radio units with hardware version "-2". The value per interface forradio units with hardware version "-1" is 150 mW lower.5) The value applies to phones with hardware version "-2". The value for phones with hardware version "-1" is60 mW lower.6) The value depends greatly on the terminal type.Terminals Socket Output P [mW]
