From: Eric Baines on
There may be some people out there with an HP 514, Rom version 2.05.00 or
earlier, which suffers from disconnections in voice and data.

If so, there seems to be a new ROM available (2.05.02) which fixes the
problem. It can be found here -
http://forums11.itrc.hp.com/service/forums/bizsupport/questionanswer.do?threadId=1200539