This one was strange so we thought we'd share the knowledge. Customer was experiencing very poor audio - almost indecipherable - on certain calls and on voicemail greetings/messages etc. Tech realized the problem was only occurring when a VCM channel was involved. He pulled out the Combo Card and saw this strange black deposit on all the exposed copper; something we've NEVER seen before. He replaced the Combo card and the issue went away completely! Weird one eh?
[Linked Image from web.atcomsystems.ca]

[Linked Image from web.atcomsystems.ca]
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