Oce 3121 Technical & Service Manual page 181

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##770 (trans) The appropriate signal could not be received, after transmitting
EOR-NULL during ECM transmission. And, the number of times that the protocol
signal was transmitted exceeded the limit.
Main cause
The line condition is poor. Preventing cor-
I
rect reception of the EOR-NULL signal.
The line condition is poor. Preventing cor-
I
rect reception of signals.
##772 (trans) DCN has been received. After transmitting EOR-NULL during ECM
transmission.
Main cause
The line condition is poor. Preventing cor-
I
rect reception of the EOR-NULL signal.
Stop has been pressed during communica-
I
tion.
##773 (trans) T5 time out (60 seconds) has occurred. Or, the number of times the
protocol signal has been sent has exceeded the limit in ECM transmission after
transmitting EOR-NULL.
Main cause
The page buffer of the other machine is full
I
or busy. The appropriate signal cannot be re-
ceived correctly, after transmitting RR in re-
sponse to RNR. RNR was received after
transmitting EOR-NULL.
ed.2
Action
Increase the level of transmission. Permit-
I
ting correct receipt of the EOR-NULL sig-
nal.
Ask the other party to increase the level of
I
transmission. Permitting correct receipt of
the signals.
Action
Increase the level of transmission. Permit-
I
ting correct receipt of the EOR-NULL sig-
nal.
Try transmission once again.
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Action
Increase the T5 timer setting, to avoid an er-
I
ror.
Change the ECM frame size: from 256 bytes
I
to 64K bytes.
Trouble shooting 73