12 Troubleshooting
Pro tips
• One call belongs in Call Analytics. A building or a week of calls belongs in the Call Quality Dashboard. The trunk belongs in OPTIONS and the SBC trace.
• Write the hypothesis before you change a dial plan. A certificate miss and a bad normalization rule leave different evidence.
• A CQD average is not that one user's call. Do not quote it as if it were.
Interview traps
• Opening the SBC trace first when Call Analytics already shows the client on a failing Wi-Fi hop.
• Calling both Call Analytics and CQD 'the call log.'
Cheat sheet
One user, one call -> Call Analytics
Many calls, one site -> CQD
Trunk up? -> SIP OPTIONS
Ladder wrong? -> SBC syslog
Then change one thing and look again
Facts in the long lessons were checked 14 October 2026. This sheet is a memory aid.