I have a customer with an OS7200 with MP20s processor card (v4.95). They reported to us that their ringplan stuck on ringplan 6. They have to temporary put it on RTO to ringplan2 to get themselves going. I logged onto the PBX, there was no holiday set for today, and no schedule under Schedule Table in the voicemail. Any idea why PBX stuck on ringplan6. I tried reboot the PBX, and it is still the same.