Typically cause 34 is sent by a quintum when a incoming call/number has no term match in that unit.
Check your number patterns.
Also, in your setup, you show call manager–>D2030. I will assume that the connection between the call manager is T1 or E1 because, as you know, the Quintum gateways do not support IP-to-IP connection.
Of course you could “fake” this out by connecting T1-1 to T1-2 so that the call goes