Understanding and Troubleshooting the OCA0188 Error in VoIP Calls
Updated: October 2025 • Reading time: 8 min • By: Allenclasses Tech Team Introduction If you’ve tried to make a VoIP call and suddenly heard a recorded message saying “OCA0188”, you’re not alone. This error often appears for Australian home users using VoIP services from ISPs like TPG, iiNet, or Aussie Broadband. It’s frustrating—but fortunately,…