When you call our technical services team, you’ll get a live person on the phone during our normal business hours of 8 a.m. to 5 p.m. Central Time (USA), Monday through Friday. Our on-call technicians are available for assistance before 8 a.m., after 5 p.m., over the weekend or on a holiday. These technicians are Crystal Group employees – the same people you talk to during the day.