Panasonic KX-TDA3192 ESVM 2 2 Channel Voice Message Card means each extension user can have a personal Voice Mailbox which can both play outgoing greeting messages as well as record incoming voice messages irrespective of the type of extension used, e.g. Proprietary Telephones (PT), Single Line Telephones (SLT), or Portable Stations (PS). The recording storage space on each voicemail box is shared between outgoing greeting messages and received voicemail messages.