The link quoted on the EclipseLink/Maven wiki ends on an Error 403 page on switch.ch. If you are redirected to a better mirror then that would already be the answer.
The URL from that page
works for me and redirects to
However, inside a pom.xml, I had to escape the &:
eclipselink
http://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/rt/eclipselink/maven.repo/