46 Digital Telephone IP Adapter Installation and Administration GuideDigital Telephone IP Adapter description Standard 2.1M39xx series digital telephone set accessory compatibilityThe following table shows Remote Gateway 9150 unit compatibility withM39xx series digital telephone set accessories.Required footstand for Digital Telephone Internal IP Adapter unitsThe Digital Telephone Internal IP Adapter unit installs in the footstand of theMeridian Digital Telephone. The required ATA/MCA footstand is standard onMeridian Modular Telephones (M2000 series) with a date code of May 6, 1998or later. Contact your Nortel distributor to obtain the required footstand if yourtelephone has an earlier date code.Supported telephone modulesDigital Telephone IP Adapter units support the following telephone modules:! add-on modules to add more keys to the digital telephone! application modules to provide more functionality to the digital telephoneNote: Digital Telephone Internal IP Adapter units do not support MeridianCommunication Adapters (MCAs) or Analog Telephone Adapters (ATAs).M39xx series Digital Telephone Set Accessoriesand Add-on ModulesDigital Telephone IPAdapter unitsHeadsets External alert & recording interface Key-based expansion module (22-button, up to two foreach 3904/05)Display-based expansion module ATA (Analog Terminal Adapter)Personal Directory PC utility Full-duplex Speakerphone CTI (Computer Telephony Integration) Adapter