  We present our work on realizing two-branch fiber links enabling
multiple-partner clock comparisons in Europe. We report in detail on the setup
connecting two long haul links, and report for the relative frequency stability
and accuracy. We report on a combined uptime of 90% for our dual-branch link
during almost one month. We finally discuss the combined uncertainty
contribution of the ensemble of the link architecture to a clock comparison. We
show that the frequency transfer uncertainty is 2 x 10 --19 .
