What happens to an international voice call between the moment it leaves your switch and the moment it lands on the destination MNO. CLI consistency, ASR by destination, false answer supervision signatures, observed from inside the chain.
Contact Sales Back to ObservatoriesA call that crosses borders passes through more hands than most rate sheets admit. The observatory tracks four signals on each leg.
Does the A-number that arrives at the destination match the A-number that left origin? Refiling shows up here first.
Answer-Seizure Ratio per destination, not averaged. Drift flags a degraded route or a SIM box warming up.
False Answer Supervision. Dead air on answer, ACD collapse before ASR moves. A fraud tell, not a routing one.
Post Dial Delay per destination. Spikes mean the call is hanging in someone’s queue before connect.
A premium rate sheet promises a direct route. Reality is often three or four intermediary hops. The observatory maps them.
The call leaves the originating carrier with the original A-number and B-number intact. CLI is verifiable here.
A tier-1 or tier-2 transit carrier. CLI usually preserved. ASR holds.
If a hop in the chain changes the A-number to ride a domestic trunk, the call has been refiling. Our observatory catches the CLI inconsistency.
The call enters a GSM gateway and terminates as local. The MNO never sees the international settlement. Detectable by short, regular call patterns.
Where the call answers (or does not). ASR and ACD measured here are what your customer experiences.
A snapshot of how often the A-number that arrives matches the A-number that left, by region. Higher percentages mean less refiling pressure on that corridor.
High
Low refiling pressure. Direct interconnects are the norm. SIM box activity is rare and quickly detected.
High
STIR/SHAKEN signing has pushed refiling down significantly since 2021. Unsigned calls get labelled spam.
Mixed
Varies sharply between operators. SIM box pressure rises in markets with high international-to-mobile rate differentials.
Active
High bypass pressure on several corridors. Direct interconnects are essential; grey-route savings do not survive the first SIM box.
The published numbers are aggregated. The corridor-level view is shared with carriers under NDA.
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