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Q.850 causes

Q.850 cause 79: Service or option not implemented, unspecified

Service or option not implemented.

79
Q.850 name
Service or option not implemented, unspecified
Group
Service unavailable
FreeSWITCH
SERVICE_NOT_IMPLEMENTED
Asterisk
HANGUPCAUSE=79
SIP response from a gateway
501 Not Implemented
Produced from SIP codes
406, 415, 501
In SIP
Reason: Q.850;cause=79

Why it happens

What to check