Measuring PSTN Exit Risk Without Spooking Sponsors
2025-11-12 · Haneul Byeon
UC Strategy · Governance · Voice
Steering committees rarely argue about codecs; they argue about calendars and cash. When SignalFoundry leads a PSTN exit blueprint, we anchor metrics to dial-tone continuity, not abstract vendor scores. The first paragraph of our readout always states what changed since the prior week, which assumptions were invalidated, and which external dependencies still lack owners.
The second phase introduces paired metrics: technical signals such as SIP OPTION success rates alongside operational signals like mean time to acknowledge an incident page. We avoid vanity dashboards that collapse under scrutiny. Instead, each chart ties to a decision: proceed, hold, or roll back.
In Korean headquarters contexts, we also document how regulatory filings intersect with numbering plans. Legal teams receive plain-language callouts rather than engineering dumps. That discipline keeps the program from stalling when counsel asks for evidence mid-quarter.
Finally, we archive every chart with hash metadata so auditors can trace what leadership saw at each gate. The habit sounds bureaucratic, yet it prevents retroactive debates about who knew what when—a surprisingly common source of delay in UC programs.