We are running v12.5 on a customer site. There are two ring groups setup, primary and secondary. The system is setup to ring the primary ring group for 15 seconds, then the secondary ring group for 15 seconds and then redirect to voicemail if not picked up. However, the first ring group will ring for 15 seconds but the second ring group will only ring for approx. 2 seconds before redirecting to voicemail. I cannot find any global settings which might be overriding the ring group settings. Can anyone offer any suggestions why this might be happening? Thank you in advance.