F931
F932
F940 Memory full
F941 No new mail found in manual reception
F942 Command
F950 Server communication error
F951 Cannot specify address. POP GATEWAY receiving machine is using the individual address.
F952 POP GATEWAY Locations specified number is over.
F953 POP GATEWAY Subject Description Style Error
F954 POP GATEWAY Password Error
F955 POP GATEWAY Wrong Telephone Number
F956 TEXT forwarding error
FF00 Mupis Command Transmission Failed or Response against Command is Invalid
FF02 End of Maintenance Request Receiving Defective
F980 NIC ABORT (when stop instruction came from NIC)
F990 Transmission Error between Server