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 (Packetize/Unpacketize,flow control, Transfers command/data between each sub-system)

c)Physical layer:

Has a bi-directional interface control circuit which comforms to IEEE1284.

Standard mode:Compatible, Nibble

Oki special mode: MCE (Mode Change Express)

Following devices are as sub-system:

1)Printer (HIPER-W: Host based Image PrintER for Windows)

Encodes a raster image data in Host PC and transfers a data with HIPER-W.

2)Scanner (Oki-SCL: Oki-Scanner Control Language)

Transfers an image data of document scanned in Fax machine to the Host PC with Oki-SCL command.

3)FaxModem (TIA/EIA Class 1)

Send/receive a Class 1 command between Host PC and Fax machine .

4)Memory (MFPL: Multi-Function Peripheral Language)

By using MFPL command, it is possible to display on screen of Host PC for condition of Fax machine and performs the initial registration of the telephone number used in Fax machine.

40672201TX Rev.4

A-2