Dictaphone (note the capital 'D') is a company which produces dictation equipment, who have, over the years, become so successful that their name is now synonymous, in more people's minds, with the name of their product.
Dictaphone and DVI (now part of Philips Electronics) are the major players in the equipment end of medical transcriptionist. DVI has a system commonly in use now whereby the dictator records his message on an Ipaq handheld, when then uploads it to a DVI dictation station.
MedQuist has now moved on to the next stage of technology beyond this, whereby the dictation is uploaded and then sent to the transcriptionist via the internet.