Lampridis, D. Gingold, T. Michalik, D. Poscia, A. Serans, M.H. Shukla, M.R. da Silva, T.P. JACoW Publishing Geneva, Switzerland 2226-0358 978-3-95450-221-9 10.18429/JACoW-ICALEPCS2021-THBR01 English 839-846 network controls hardware timing interface Contribution to a conference proceedings 2022 2022-03 https://doi.org/10.18429/JACoW-ICALEPCS2021-THBR01 https://jacow.org/icalepcs2021/papers/thbr01.pdf The Open Analogue Signal Information System (OASIS) acts as a distributed oscilloscope system that acquires signals from devices across the CERN accelerator complex and displays them in a convenient, graphical way. Today, the OASIS installation counts over 500 multiplexed digitisers, capable of digitising more than 5000 analogue signals and offers a selection of more than 250 triggers for the acquisitions. These triggers are mostly generated at a single central place and are then distributed by means of a dedicated coaxial cable per digitiser, using a "star" topology. An upgrade is currently under way to renovate this trigger distribution system and migrate it to a White Rabbit (WR) based solution. In this new system, triggers are distributed in the form of Ethernet messages over a WR network, allowing for better scalability, higher time-stamping precision, trigger latency compensation and improved robustness. This paper discusses the new OASIS trigger distribution architecture, including hardware, drivers, front-end, server and application-tier software. It then provides results from preliminary tests in laboratory installations.