Quadro6L/4L Manual I: Installation Guide Step 2-B: Using Key System Emulationo Use SLA Settings - choose this selection to use the SIP settings of anotherSLA line. This selection is also used to allow multiple line appearances onthe same ITSP provider. The SLA drop down list is used to select the SLAline whose SIP settings will be used for the corresponding SLA line. TheDID text field requires an optional identification number used by some ITSPproviders to differentiate between the call appearances on the selected line.The Use DID for outgoing calls indicates whether the specified DID num-ber should be included in the Caller ID of calls initiated from the SLA. If thischeckbox is enabled, the DID number will be sent along with the SIP user-name. This checkbox should be enabled if the IP-PSTN provider authorizesthe users by their DIDs.For this configuration scenario, choose the SIP option with Custom Settings. Provide allrequired information of the SIP server. Save the settings.Now your SLA line will be handling calls through the defined SIP server. The IP phone canbe called by the SIP username of its SLA line. All incoming calls from that SIP server will beblinking on the corresponding programmable key of the IP phone, as described in the pre-vious chapter. For outgoing calls through the defined SIP server, the user should simplypush the programmable key assigned to the corresponding SLA line, and dial the SIP num-ber of the called user.Please Note: Quadro can also be configured in a mixed Key System Emulation mode, i.e.having one SLA lines assigned to the SIP servers will still make possible to have others as-signed to the available PSTN lines.How to disable the Key System EmulationIn the default configuration of the Quadro6L/4L, the Key System Emulation is activated.The 6 FXO lines of the Quadro6L device are correspondingly attached to the first 6 SLAlines (SLA 7 and SLA 8 are inactive) and the 4 FXO lines of the Quadro4L device are cor-respondingly attached to the first 4 SLA lines (SLA5, SLA6, SLA7 and SLA8 are inactive).As indicated above, this causes some limitations in using the FXO lines on the Quadro.If you wish to move back to the regular FXO lines usage on the Quadro6L/4L, you canachieve it by disconnecting the FXO line from the SLA by inactivating the SLA or by chang-ing the SLA assignment to a SIP server. To do that, go to the Key System Emulationpage from the Telephony menu, push the SLA line to which the corresponding FXO(PSTN) line is assigned, choose the Inactive or SIP option and save the selection (in caseof SIP, additional information should be provided as described above). Perform the samesteps for other SLA lines, as needed. Now your FXO lines are available to be used throughthe Auto Attendant and Call Routing.Quadro6L/4L; (SW Version 5.2.x) 40