Page 12 of 104 M2000 Series Meridian Digital Telephones553-3001-108 Standard 9.00 April 2000• Power requirements 32• Handsets 38• Ordering information 39Reference listThe following are the references in this section:• Digital Telephone Line Engineering (553-2201-180)• Equipment Identification (553-3001-154)• Telephone and Attendant Console: Installation (553-3001-215)• X11 Features and Services (553-3001-306)• X11 Administration (553-3001-311)This chapter provides feature, add-on module, relocation, and specificationinformation for the M2006, M2008, M2008HF, M2616, M2016S, andM2216ACD Meridian Digital Telephones.Functional descriptionThis section provides feature and software requirement information for theM2006, M2008, M2008HF, M2616, M2016S, and M2216ACD digitaltelephones.Note: There are three distinct versions of M2000 Series MeridianDigital Telephones—all three are supported. The versions can be clearlydistinguished by the first four letters in the upper left-hand corner of themodel identification label on the bottom of the telephone. The threeversions are the “NTZK” models, the “NT2K” models with date codeprior to April 24, 1998; and the third version includes both the “NT9K”models and the “NT2K” models with date code of April 24, 1998 andlater. In addition, the two jacks face in the same direction on “NT2K” and“NT9K” telephones, and in opposite directions on “NTZK” telephones.When appropriate, differences between the models are noted in thisdocument.