Quadro6L/4L/2x2 Manual I: Installation Guide Step 2-B: Using Key System EmulationQuadro6L/4L/2x2; (SW Version 5.3.x and higher) 37Step 2-B: Using Key System EmulationThe Key System Emulation is a widely used service in legacy PBXs simplifying the directconnection to the available PSTN lines. On the Quadro6L/4L, the usage of Key SystemEmulation services (not available for Quadro2x2) is limited to the IP phones attached to theQuadro through the available IP lines and provides direct connection to the available PSTNlines and SIP networks. In its turn, the IP phones are limited to the following models withthe perspective to enlarge the list of recommended IP phones in the future:The Key System Emulation feature allows to:• Have a direct connection to the available PSTN lines and SIP networks behindthe Quadro by pushing the programmable keys on the IP phone.• Monitor the availability and status of all configured external lines via programma-ble keys on the IP Phones.• Place the call on hold from one IP phone and pick it from another IP phone at-tached on the Quadro.Go to the Telephony menu of the Quadro’s Web Management for Key System Emulationservice configuration.By default, the 8 SLA lines of the Quadro6L/4L are in inactive mode.• Aastra 480i • Aastra 6739i• Aastra 480iCT • snom 320• Aastra 9133i • snom 360• Aastra 9480i • snom 370• Aastra 9480iCT • Snom 710• Aastra 9143i • snom 720• Aastra 55i • snom 760• Aastra 57i • snom 820• Aastra 57iCT• Aastra 6730i• snom 821• snom 870• Aastra 6731i