We have native ipEdge (1.6.2.3701) that will not allow users to call out or call in randomly once or twice a day.
They have analog trunks with a Mediatrix FXO gateway. We have replaced the gateway thinking that might be the problem, but the issue persists.
Have had the carrier come in and check their equipment (IAD converting digital to analog - I know why not go SIP? no idea). They say their equipment is good.
Today customer informed me that at the same time they couldn't call out or in, they couldn't check voicemail either - new issue WTH?
When I checked Maintenance - System Maintenance - System processes
SIP Converter had restarted at the same approx time the issue was reported. Coincidence? What does this all mean?
Does anyone have any suggestions?
I don't even know what logs to look at.

THanks in advance,