What does he build on Monitor?
The engine that places the test calls and judges each one by the SIP code, by two-way audio, and by measured voice quality; the escalation ladder; the SLA reports; and the agent that tracks the internet link at each site.
What does he write about here?
About what happens on a call that fails: what each SIP code and each Q.850 cause means, how to measure voice quality, how to calculate an SLA, and how to prove an 0800 number was up. Each page says how Monitor handles the case, based on the same rules the product applies.