69Options ListActivate Headset port external alerterWhen the Headset port external alerter option (available on the M3904) isactivated, it supports a visual or audible alerter and/or recorder device. Thisdevice plugs into the Headset port, which is located on the bottom of thetelephone. After you select Headset port ext alerter from the Options Listmenu;orFrom the Ext alerter screen, press theOn Key to turn on Headset portexternal alerter.orPress the Off Key to turn off Headsetport external alerter.Press the Done Key to save changes. Press the Quit Key or Options Key to exit.Note: Additional equipment is required to implement this option. For moreinformation please contact your Nortel Networks distributor.Use Call indicator lightThe incoming call indicator light can be controlled on the M3904. After you selectCall indicator light from the Options List menu;orFrom the Indicator screen, press theOn Key to turn on Call indicator light.orPress the Off Key to turn off Callindicator light.Press the Done Key to save changes. Press the Quit Key or Options Key to exit.OnOffOnOff