Oki OKIFAX 5400 Maintenance Manual page 350

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.
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
requirement).
(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: Compatible, Nibble
Oki special mode: MCE (Mode Change Express)
Following devices are as sub-system:
40838301TH Rev.1
Memory Application Layer
(MFPI.)
Data Link Layer
Physical Layer
A3 - 69
8PPM
300 dpi
OKIFAX 5400
Printer Scanner
FaxModem
(Hiper-W) (Oki-SCL 1)
(Class 1)
Oki-MFPI
IEEE 1284
CTR
Memory
(MFPI.)