Standard MIDI File (SMF) SMPTE

SCSI musical data interchange. A specification for sending MIDI sample dumps over the SCSI bus. See SDS.

Station Message Desk Interface or Simplified Message Desk Interface - this links users to their mailboxes and tells them when voicemail is in the mailbox.

(Station Message Detail Interface) - the interface whereby a voice-mail system notifies a PBX to turn on/off the message waiting indicator.