Chapter 2: Service Error Codes
2-88
Cause
Remedy
##620
[ TX/RX ] In a facsimile machine supporting the
Internet through a provider, a check sum
error has occurred during negotiation with
the server
• Start a communication once again.
• Check the DTMF exchange sound; if the
transmission/reception is not correct, re-
place the system control board.
• Record the protocol on a DAT or MD, and
have it analyzed by the local Canon office
and/or Technical Center.
1. Increase the DTMF transmission level
so that the sever may receive the DTMF
signal correctly.
2. Adjust the DTMF transmission time so
that the server may receive the DTMF
signal correctly.
• Contact the provider.
• The line condition is poor, and the data be-
came garbled by accident.
• If the error occurs often, the terminal or
the line is faulty.
• If the error occurs at all times, the server is
faulty.
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