I have connected a 6210 for datacommunication to a datalogger, hp34970A, and when I call the 6210 it says 'DATAOPKALD' and rings, but do not switch on to the serial port. When I press the 'lift phone' symbol the connection is established. As this operation is difficult in a remote application I would be pleased if you could tell me if a setting in the 6210 will set the autoanswer onas I feel that is the problem.