Oki OKIOFFICE 84 Service Manual page 365

NCU Board
UNC5 -------- For US and Canada
WN5 --------- For Denmark, Norway, Sweden, Finland, The Netherlands, Ireland, Portugal, New Zealand, Australia,
Belgium, Spain, Greece and Other countries
DN5 ---------- For Germany, Switzerland and Austria
FN5 ---------- For France and UK
l
Conversion of receive data and receive signals to internal signal level
l
Conversion of send data and send signals to external signal level
l
Generation of dial pulses to telephone line
l
Detection of ringing signal
l
Detection of busy tone (conjunction with Modem unit)
l
Detection of hook up signal
l
Interface with telephone handset (option)
l
Output of send data and send signals to telephone line
l
Input of receive data and receive signals from telephone line
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Service Guide OKIOFFICE 84
Chapter A Board Descriptions
Page: 212