We just installed our first implementation of 3CX about a week ago. On Wednesday evening of this week, 4/4/2018, I installed the SP4 update. Since that time, only 1 call coming in with "(anonymous)" as the caller id has completed. I didn't draw any correlation until I received a complaint, by email, from a customer stating that they were not able to call us. We use Patton 4114 and a Welltech gateway with POTS lines. I didn't make any other (aside from the SP4 update) system configuration change, only some updates to individual extensions for voicemail and BLF changes. Any thoughts?