Yes a Linksys/SPA3102 is registered at the EU server.
The fact that it routes to voicemail after 27 seconds means that the firewall is not letting inbounds on UDP 5060 from the EU server.
You need to make sure that you setup your clients to bypass NAT issues. There are many posts in this forum that outline various strategies. Take the time to search.
Unfortunately there is no single answer, as each case is uniquely different.
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Martin
Please post support questions on the forum. Do not send PMs unless requested.
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