Northern Telecomsaid it shipped the first digital central office switching
system it sold to Nippon Telegraph and Telephone under the
terms of a 250 mln dlrs supply agreement.
    The agreement began with the signing of a letter of
understanding in December 1985. THe formal seven-year agreement
was signed in May 1986.
    The Northern Telecom systems is the first U.S.-manufactured
digital central office switching systems to be installed in the
Japanese public telephone network, it said.
  
 Reuter
