A video compressionstandard developed by ITU-T before 1992 to work with {integrated service digital network}. Data is compressed at the rate of 64P kilobits per second, where P can range from 1 to 30 depending on the number of ISDN channels used. This standard was developed primarily to support video phones and {video conferencing}. See also ivs. . [Date? Details?] (1994-11-03)