Complex sentence: A ruling by Judge Harold H. Greene on March 7,1988, removed this barrier but while the BOCs were now allowed to offer voicemail service, they remained barred from designing or manufacturing equipment used to provide the service.
Split into simpler sentences: A ruling by Judge Harold H. Greene on March 7,1988, removed this barrier. While the BOCs were now allowed to offer voicemail service, they remained barred from designing or manufacturing equipment used to provide the service.