Plan requirement
| Subscription | CLASSOUND Core or CLASSOUND Pro |
Calls presenting a number that cannot be verified can be blocked before they reach anyone. Here is what that catches.
What spoofing is
A caller presents a number that is not theirs, often a local one or one that looks like a bank or a supplier. It is the mechanism behind most voice fraud, and it works because people trust what their phone shows them.
What blocking does
Networks increasingly verify whether a caller is entitled to present the number they are showing. Calls that fail that check can be rejected before they reach a phone.
Your staff never see them, which is the point: the best defence against a convincing fraudster is not having the conversation.
What it will not catch
- Calls from a real number the caller genuinely controls
- Calls from countries where verification is not yet in place
- Anything where the deception is what is said rather than the number shown
This reduces a category of attack rather than removing fraud. Staff still need to know that no bank asks for credentials by phone.
A small number of legitimate calls may be affected. Some organisations present a main number from a call centre in a way that fails verification. If a supplier says they cannot reach you, this is worth checking before assuming a fault.
Turning it on
Ask us whether it applies to your numbers. It is a CLASSOUND feature, so numbers on Multi Carrier Trunks are not covered by it.
The other direction
To make your own outbound calls more trusted, register your numbers properly and consider branded calling, so your name appears alongside your number.
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