Ricoh A250 Service Manual page 440

One-step Shift-up from the Receiving Terminal
The diagram shows the protocol used by this model acting as the receiving
terminal.
If this machine has sent two consecutive MCFs and it could detect good line
condition, it will request the sending terminal to make a one-step shift-up in the
next control channel
SM
TX RX
26.4kbps Fax data
M C F
26.4kbps Fax data
M C F
26.4kbps Fax data
M P h
M P h
M C F
28.8kbps Fax data
2-19
FAX COMMUNICATION FEATURES
1
2
Shiftup
A891D534.WMF
A250