Appendix E: M3110, M3310, and M3820 telephones Page 473 of 504Telephones and Consoles Description, Installation, and OperationMeridian External Alerter and Recording InterfaceThe External Alerter Board provides an interface to standard remote ringingdevices, such as a ringing unit, installed in a location separate from thetelephone. The Meridian External Alerter and Recording Interface (MEARI)is not the remote ringer itself, but provides access to standard, off-the-shelfremote ringing devices. The Alerter Board requires additional power. See“Power requirements” on page 488.You can program the MEARI interface to activate a ringer (or light) when thetelephone rings or when the telephone is in use (off-hook). A call to any DNconfigured on the telephone triggers the alerter. The MEARI alerts to oneactive call at a time; if the telephone is already active on a call, a second callwill not activate MEARI.For information on installing and setting up the External Alerter, see “Add-onmodules” in “External Alerter Board” on page 416.Brandline InsertThe telephone contains a removable insert designed to accommodate customlabeling. You can order blank Brandline Inserts and have a printer silkscreenyour company logo on them.MeridianCommunicationsAdapter (MCA)x x xExternal alerterinterfacex x xBrandline insert x x xTable 78Hardware features and optionsM3820 M3310 M3110Note: In this table, x indicates available features for the telephone typelisted in the top row.