Ricoh D117 Service Manual page 1080

Code Meaning
EOL signal (end-of-line)
from the other end not
0-21
received within 5 s of the
previous EOL signal
The signal from the other
end was interrupted for
0-22 more than the acceptable
modem carrier drop time
(default: 200 ms)
Too many errors during
0-23
reception
The other terminal did not
0-30 reply to NSS(A) in AI short
protocol mode
SM
Suggested Cause/Action
Check the connections between the FCU and
line.
Check for line noise or other line problems.
Replace the FCU.
The remote machine may be defective or may
have disconnected.
Cross reference
Maximum interval between EOLs and between
ECM frames - G3 Bit Switch 0A, bit 4
Check the line connection.
Replace the FCU.
Defective remote terminal.
Check for line noise or other line problems.
Try adjusting the acceptable modem carrier
drop time.
Cross reference
Acceptable modem carrier drop time - G3 Switch
0A, bits 0 and 1
Check the line connection.
Replace the FCU.
Defective remote terminal
Check for line noise or other line problems.
Try asking the other end to adjust their tx level.
Try adjusting the rx cable equalizer setting
and/or rx error criteria.
Cross reference
Rx cable equalizer - G3 Switch 07 (PSTN)
Rx error criteria - Communication Switch 02, bits 0
and 1
Check the line connection.
Try adjusting the tx level and/or cable
equalizer settings.
The other terminal may not be compatible.
Cross reference
Dedicated tx parameters - Section 4
23
Error Codes
D649