Kyocera FS-1128MFP Service Manual - Page 148
(2-7) U017XX error code table: V.34 transmission - process unit
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2JN (2-7) U017XX error code table: V.34 transmission Error code U01700 U01720 U01721 Description A communication error occurred in phase 2 (line probing). A communication error occurred in phase 4 (modem parameter exchange). Operation was interrupted due to the absence of a common communication speed between units. U01700: A communication error that occurs at the transmitting unit in the period after transmission of INFO0 before entering phase 3 (primary channel equivalent device training). For example, INFO0/A/Abar (B/Bbar, for polling transmission)/ INFOh was not detected. U01720: A communication error that occurs at the transmitting unit in the period after initiating the control channel before entering the T.30 process. For example, PPh/ALT/MPh/E was not detected. U01721: In the absence of a common communication speed between units (including when an impossible combination of communication speed and symbol speed occurs) after MPh exchange; 1) a DCN signal was received from the destination unit, and the line was cut; or 2) a DIS (NSF, CSI) signal was received from the destination unit and, in response to the signal, the unit transmitted a DCN signal, and the line was cut. (2-8) U018XX error code table: V.34 reception Error code U01800 U01810 U01820 U01821 Description A communication error occurred in phase 2 (line probing). A communication error occurred in phase 3 (primary channel equivalent device training). A communication error occurred in phase 4 (modem parameter exchange). Operation was interrupted due to the absence of a common communication speed between units. U01800: A communication error that occurs at the receiver unit in the period after transmission of INFO0 before entering phase 3 (primary channel equivalent device training). For example, INFO0/B/Bbar (A/Abar, for polling reception)/probing tone was not detected. U01810: A communication error that occurs at the receiver unit in phase 3 (primary channel equivalent device training). For example, S/Sbar/PP/TRN was not detected. U01820: A communication error that occurs at the receiver unit in the period after initiating the control channel before entering the T.30 process. For example, PPh/ALT/MPh/E was not detected. U01821: In the absence of a common communication speed between units (including when an impossible combination of communication speed and symbol speed occurs) after MPh exchange, a DCN signal was transmitted to the destination unit and the line was cut. (2-9) U023XX error code table: Relay command abnormal reception Error code U02303 U02304 Description Timeout was detected before a correct DNL signal was received. A signal other than MPS or EOM signal was received after a DNL signal was received. (2-10) U044XX error code table: Encrypted transmission Error code U04400 U04401 Description Encrypted transmission was interrupted because encryption keys did not agree. Calling failed during encrypted transmission because the encryption key was not registered. 1-4-30