3) Sends the following signals received from the line to the R51 board as data after amplification.
l
Picture data/Protocol/Tonal signals, etc.
Note 1:
This procedure may be omitted depending on the dial parameters.
Note 2:
MF (Multi-frequency) tone is generated by the modem and transferred to the telephone line via the NCU board.
3. Explanation on CN3 Terminals