We have 60 SIP Trunks, as of this time of year there aren't too many being used at once, I'd say 10-15 tops at once. However, during our busy season, (on old phone system) we've had customers say they had a busy dial tone and we had 23 lines.
We're using IVR for menu and schedules, and our current menu message is almost 2 minutes which holds up a port for a decent amount of time.
If all UpiQ ports are being used, does the caller just keep holding? If all outbound callback are being used, will the agent get a message or something?