AUX is the abbreviation of Auxiliary port. Continue to read this post from MiniTool to get more details. What do numbers like “20A” or “15A” mean on breaker labels? It is normal to feel unsure about your distribution box. It allows a PC or other device to send or receive. What Is Aux Time in a Call Center? Aux time is the time an agent spends logged into the telephony system but unavailable to receive inbound contacts. How long. The three terms we will be decoding today (aux, sends, returns) all have to do with signal routing. For example, one might route a vocal track to a separate auxiliary track. Look up aux in Wiktionary, the free dictionary. This chapter describes the AUX.