2 definitions found

From The Free On-line Dictionary of Computing (27 SEP 03) [foldoc]:

PRI {ISDN} {Primary Rate Interface}. See also {BRI} (1994-12-08)

From Virtual Entity of Relevant Acronyms (Version 1.9, June 2002) [vera]:

PRI Primary Rate Interface (ISDN)
  Definitions retrieved from local copies of the freely distributed DICT client/server software and databases. Click here for database copyright information. - KM.