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BLOCKROCK
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Quality and fraud prevention

Know the traffic.
Manage the risk.

Trust begins with knowing the traffic, the counterparty and the route. Agree the intended use, investigate unexpected behaviour and reconcile the records that support a dispute.

Discuss your requirements

The four measurements

Read the signals.

ASR

Answer-seizure ratio

ITU-T E.425

The share of seized calls that end in an answer. It moves with the traffic as much as with the route, so we read it against the same traffic over time.

NER

Network effectiveness ratio

ITU-T E.425

A reading of network handling from release causes. Distinguish network failures from normal user outcomes using an agreed classification; the figure alone does not establish the cause of a change.

ACD

Average call duration

Traffic context

Call duration varies with traffic and quality. A change is a signal to investigate alongside the other measurements.

PDD

Post-dial delay

Setup timing

Call-setup delay to the agreed measurement point. An increase is a signal to investigate, not proof of a particular routing path.

These measurements feed NRSA, which combines them with the rate of the destination into a Total Quality Indicator per supplier and per prefix. Quality thresholds, escalation and any blocking or rerouting actions are agreed for the interconnect.

Fraud

Fraud has a real cost.

The Communications Fraud Control Association's 2023 survey put the industry's fraud losses at close to 39 billion US dollars a year. For a wholesale counterparty, fraud means unpayable invoices generated in hours.

Annual industry losses, 2023
$38.95B
Source: CFCA Global Fraud Loss Survey 2023

Voice

Revenue share fraud

Traffic pumped to high-rate numbers whose owner shares the termination fee — the first concern of wholesale carriers.

Voice

Wangiri

One-ring calls that tempt the called party to call back a premium number.

Voice

CLI spoofing

A false calling number, to deceive the called party or to buy a cheaper rate.

Voice

False answer supervision

A route that signals an answer before anyone answers, and bills the ringing time.

SMS

Artificially inflated traffic

Sign-up and OTP flows fed with numbers that exist only to collect a termination fee.

How we defend

  • Credit per call. Rated calls and running totals support review against agreed credit limits and escalation terms.
  • Operational review — rate, margin and credit indicators help identify traffic that needs investigation.
  • Destination restrictions — revenue-share ranges and any opt-out requirements are addressed in the commercial discussion.
  • Blocked ranges for destinations that exist only to be dialled by machines.
  • Escalation contacts. Agree operational contacts and the procedure for reporting suspected fraud before traffic starts.

What we refuse

  • Refiling that strips or fakes a CLI when a CLI route was sold.
  • Grey SMS routes sold as direct.
  • Traffic whose origin a counterparty will not disclose.
  • Destinations we cannot reach honestly — marked blocked, not sold and hoped for.

Agree the response

Identify. Investigate. Act.

The interconnect should define responsibilities, escalation and any traffic action. No single indicator establishes fraud on its own.

  1. 01

    Identify

    Record the affected route, time window and observed change in traffic, quality or exposure.

  2. 02

    Investigate

    Compare records with the counterparty and distinguish a network fault from unexpected use.

  3. 03

    Contain

    Apply the restrictions or other actions agreed for the interconnect and the finding.

  4. 04

    Reconcile

    Review the affected records, commercial treatment and conditions for restoring traffic.

Requirements

Requirements for interconnection.

Counterparties

Counterparty information

Company and contact information establish the basis for interconnection discussions.

Anti-spoofing

Calling-number identification

OFCOM sets identification requirements for transit providers handling calls from abroad with Swiss numbers. Read the current requirements.

Data protection

Federal Act on Data Protection

Personal data handled under the revised FADP, in force since 1 September 2023.

Records

Swiss company and tax law

Operational signalling and call records support routing, quality checks, billing and investigations. Those operational uses must be distinguished from mining or selling communication content.

Next step

Open an interconnect.

Tell us the destinations, the volumes and whether you buy, sell or want to swap. We will discuss rates and interconnect terms with you.

Request a rate sheet