- In role-playing games, a die with four sides.
d4 - Computer Definition
Also known as M24 Superframe, with M meaning Multiplex. A T-carrier framing convention that enables bit robbing of the least significant bit (LSB) of the sixth and twelfth frames, only, of a 12-frame sequence or superframe.Voice and data both are accommodated, with data treated as a digital input. Ones density must be maintained through the insertion of stuff bits. See also bit robbing, D1, D2, D3, ESF, frame, LSB, ones density, superframe, and T-carrier.
(1) (D4) A framing format for T1 transmission that places 12 T1 frames into a superframe. See ESF.
(2) (Digital-4) There was never a D-4 videotape format because the Japanese believe 4 is unlucky. The pronunciation of the number sounds like the word for "death."