Oki OKIOFFICE44 Service Manual page 302

2. Function
2.1 Summary
By installing the optional board (Bi-Centro), the following MFP (Multi-Function Peripheral)
function can be realized.
Example:
• PC printer function (300/Q600 dpi)
• PC Scanner function
• PC Fax Modem function (TIA/EIA Class 1)
• PC Memory function
• PC Multiplex function Disable Enable
Interface between Fax machine and Host PC consists of three layer structure as detailed below,
each sub-system can be operated at the same time by adopting a Oki-MFPI protocol in both Fax
machine and Host PC.
Note: A simultaneous operation is not supported in OKIOFFICE 44, but the structure is
Host PC
Printer
Scanner
FaxModem
(Hiper-W)
(Oki-SCL 1)
(Class 1)
Oki-MFPI
IEEE 1284
a) Application layer:
Performs a function control of each sub-system at the Host PC and Fax machine.
b) Data-Link layer:
Performs a protocol control at the Host PC and Oki-MFPI (TIA IS650 Level 1 require-
ment).
(Packetize/Unpacketize, flow control, Transfers command/data between each sub-system)
c) Physical layer:
Has a bi-directional interface control circuit which conforms to IEEE1284.
Standard mode:
Oki special mode: MCE (Mode Change Express)
Board Descriptions
same as other machine (OKIFAX 5000 series).
Memory Application Layer
(MFPI.)
Data Link Layer
Physical Layer
Compatible, Nibble
A - 60
OKIOFFICE 44
4 PPM 8PPM (Target)
8 dot/mm 8 dot/mm (INT'L),
300 dpi (ODA)
OKIOFFICE 44/OKIFAX
4100/5000 series
Printer Scanner
(Hiper-W) (Oki-SCL 1)
Oki-MFPI
IEEE 1284
OKIOFFICE 44 Serv. Man., P/N 59276801
Memory
FaxModem
(MFPI.)
(Class 1)