Carrier-Neutral PSTN Exit Blueprint
Architecture sessions that map legacy PSTN dependencies, SIP trunk failover, and dial-plan governance before you cut traffic.
Category: UC Strategy · Format: Hybrid workshops + on-site cutover support · Duration: 9 weeks
Indicative investment: ₩12,800,000 KRW
Overview
SignalFoundry anchors this engagement in measured discovery workshops with your voice engineering leads and finance stakeholders. We document current trunk contracts, emergency routing assumptions, and regulatory touchpoints for South Korea interconnect rules. Deliverables include a phased cutover calendar, test call matrices, and rollback scripts that operations teams can rehearse without vendor lock-in. The outcome is a board-ready narrative on why each migration window was chosen and what telemetry will prove dial-tone continuity.
Included focus areas
- Inventory of gateways, SBCs, and CDR sources with ownership tags
- Traffic shadowing plan with mirrored dial-plan validation
- Executive readout on capex versus incremental trunk spend
- Runbook pack for night-shift engineers with bilingual annotations
- Compliance checklist aligned to financial-record retention for calls
- Partner-neutral RFP language for trunk replacement if required
- Post-cutover tuning window with weekly observability reviews
Outcomes sponsors sign
- Signed governance model for PSTN migration decisions
- Quantified risk register with mitigation owners per site
- Operational confidence score tracked across three rehearsal cycles
Lead consultant
Haneul Byeon
Engagement Director with fifteen years staging voice migrations for regional banks and logistics groups.
FAQ
Do you mandate a specific carrier?
No. We document requirements and evaluate proposals with you, but procurement stays in your hands.
What if our documentation is incomplete?
We budget discovery buffer hours and surface gaps early; additional field surveys are quoted separately.
Is weekend work included?
Two supervised migration windows are included. Extra weekends require a written change request.
Experience notes
The PSTN inventory workshop finally gave our finance team the same vocabulary as voice engineers.