False ANSWER

If you are using GREY routes (not legal) be ready to experience false Answer or false RING.

False ANSWER (FAS)

That means that i some way between caller and callee some "grey" provider answers the call but still plays ringing sounds to fake the call.

The call will be marked as ANSWERED but in reality nobody will answer.

To avoid this - talk with your provider or use "white" routes.

False RING

When caller presses dial button - he immediately hears ringing signal - this is False Ring.

One of the providers in the chain are generating it.

Solution - talk to provider to fix this or change provider.

Why it happens only sometimes - because call is routed through bad provider using different rules - sometimes all others are busy, sometimes it is cheaper and so on - that's Least Cost Routing or similar technology - in short - call is not routed over bad provider all the times.

Betamax

This is very often happens with Betamax company group providers: http://backsla.sh/betamax

Voice Trading

http://www.voicetrading.com/

This provider supports 3 quality routes:

• Dialing number in E164 format: GREY
• Prefix 00: STANDART
• Prefix 000: PREMIUM

GREY plan has FALSE ANSWER problem.

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See also:

• Fake False Answer Supervision (FAS) service