I'm new to RC and am trying to set up FaxOut using the fax api (https://service.ringcentral.com/faxapi.asp) However, whenever I hit it with a post request I get a 503 temporarily unavailable error. Is that service currently down? and, if so, when is it expected to got back up?
A 503 means just that, a temporary unavailable service. If you/your app, waits 60 seconds and retries then receives another 503, incrementally double the wait time until it is back. Usually this is momentary.