If I understand you properly, it sounds like you have the 8410 covering to the shop phone and its second point of coverage is Audix. I presume, you do in fact want it to go to Audix , if the shop phone does not pick it up. If not, give it a new coverage path with no second point programmed & it will ring the shop phone forever. If you do want it to end up in Audix, you need to change the (system wide) second coverage ring parameter in the system parameters coverage-forwarding form, to increase the number of rings, its usually 2 rings by default, I believe. As long as it does not negatively affect other phones in the system, you should be able to increase it at least by one or two ring cycles. If you list the coverage paths in the switch you can see if second point of coverage is being used that much.