Unsuccessful transfer attempt produces the record in the 3CX log:
10:35:16.312 CallConf:nIncoming [CM103002] Call(14): Incoming call from 112 (Ext.112) to sip:[email protected]:5060
Bad thing 1
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Ethernet sockets are too weak. I forecast short life in production zone.
Bad thing 2
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There is no Reset button at all. You can reset phone through standard web interface or by executing undocumented procedure (you can get it from D-Link technical support).