Oki OKIOFFICE84 Maintenance Manual page 299

3. Explanation on CN3 Terminals
CN3 Terminal
pin No. name
1 REV2 Detection and output of the direction of DC
line current.
2 OH2 Detection of off-hook of terminal connected
to TEL-1 or TEL-2.
3 OH1 Output upon circuit current detection
after fax line seizure
4 RI 0 - 5 V signal output synchronized with the
ringing signal frequency
5 NC Unused terminal
6 PP Relay control signal for special service code
detection at parallel pickup or remote reception
7, 8 E GND
9, 10 sub + 5 V Sub power supply for OH2 and RI detection
11, 12 + 5 V Power supply for relays and logic circuits
13, 14 + 5 VA +5 V power supply for analog circuit
15, 16 S TX Signal
17, 18 – 5 VA – 5 V power supply for analog circuit
19, 20 R RX Signal
21, 22 SG Signal ground
23, 24 Rp Receiving sensitivity determination terminal
25 DP Pulse dial control signal
26 CML Line seizure control signal
27 F. ICC Loop current control signal upon line seizure
28 SR Control signal for connection between LINE and
TEL terminals
29 PBXE Control signal for connecting one of LINE
terminal to the PBXE terminal
30 MUTE Control signal for pulse dial improvement and
bell shunt relay
Note *: Unused.
Explanation
A3 - 29
UNC WN5 DN5
(US.CA) (INT'L) D.A.CH)
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40672201TH Rev. 4
UNC/WN5/FN5/DN5
FN5
(F.UK)
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