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Abacus: I got a No Ring Back Failure when testing FAX with analog line. What is the problem?

Environment/Versions

N/A

Answer

There is a conflict of DSP resources in Abacus.  Both FAX and Call Progress Detection require the use of DSP. With that, only one of that can be enabled.

Product : Abacus,Analog,6.20,6.11 and below