Got a wierd problem I hope someone can help with. The chassis has 2 Hiper ARCs (5.3.110) and 6 Hiper DSPs (3.5.109). We're running PRI's to them. The Hiper ARC "list chassis" shows the correct cards, the ARC in slot 15 owns all the DSPs, the ARC in slot 16 owns nothing. NMC Chassis Awareness is disabled on both Hiper ARCs, they are set up statically. On a DSP with no PRI plugged in, I see something like "DS0 Timeslot Idle", whatever is normal. With a PRI plugged in, after a hardware reset on the DSP, you see the same thing. Then somewhere between 5 and 60 seconds after the reset, the status goes to "DS0 Local Out of Service" on all the timeslots. The DSPs have been reset to factory Defaults, with the only change being the Switch Type, which is set to NI2, of course followed by saving the setting and resetting the card. I know this setting is correct, I can unplug the PRI from the DSP card and plug it into a PortMaster (which is configured for a plain PRI with NI2 as the switch) and it links up and takes calls right away. I'm reasonable certain it's not the Hiper ARC, because we did at one point have half the DSPs owned by each ARC and had the same result. Pulling my hair out over this one - any suggestions? Any idea what I'm overlooking or not checking? Any suggestion would be appreciated. Thanks, Joel