After two years of effort with little to show for it, Apple eventually gave up on Versit, and telephony in general. The main problem was that the various PBX companies relied on vendor lock-in to keep their existing customers coming back to them for newer products, so the very concept of a standardized system was seen as a problem rather than a solution. Lip-service was paid to the concept in order to have an answer to those predicting such systems would become common. Additionally there was no support for high-speed serial on the basic PC, so users would have to buy an add-on card if they were going to use GeoPort, at which point it made just as much sense to buy a custom adaptor on a different card.