Oki OKIFAX OF-38, Field Service Manual

Page: 17 / 284

Item
Specifications
16
Fall-back
The automatic fall-back system will attempt
transmission in the following sequence in accordance
with an response signal from a remote
machine.
9600 7200 4800 4800
2400
(second)
2400 bps DCN
(second)
The transmitter can transmit a DCN signal to
the remote station for disconnection after the
second 2400 bps transmission is attempted.
1) ARQ (by
The automatic fall-back system can have
the receiver send either a NAK tone 5 times
continuously, or 10 times non-consequentive.
9600 7200 4800 2400
If at 2400 bps, the receiver has not made a successful
detection in 30 seconds of the normal frame, the
receiver can transmit a DCN signal as an error
communication.
2) ECM
The automatic fall-back system will use the
following sequence if the transmitter has not
detected the MCF from the receiver, after the
transmitter has sent the same block 4 times
continuously.
9600 7200 2400 bps
At 2400 bps, the transmitter can send the same block
continuously to a maximum of 24 times.
However, if the transmitter has not detected a MCF
from the receiver, the transmitter can send a DCN
signal as an error communication.
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