Page: 7
Service Guide OF2200/2400/2600
Chapter 1 Principles of Operation
1.1.04 Automatic Fall-back Mode
The unit will change the message transmitting speed according to the following fall-back plan. The first
page of the message is transmitted at 14.4 kbps (Okifax 2200 communicates at 9600 bps maximum). The
receiving station will continuously monitor the received data. If the receiving station detects six or more
consecutive error lines during reception of a single page, or if the total number of errors detected during
the reception of a single page exceeds 10% of the data on the transmitted page, it will return a Retrain
Negative (RTN) signal to the transmitting station upon termination of the page reception. With an RTN
signal received, the transmitting station will downgrade its speed by one level (to 12 kbps in this case) and
continue transmission of the next page. Similarly, should the transmitting station again receive an RTN
signal from the receiving station, it will downgrade the speed another level.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Summary of Contents for OF2200
Page 87: ...Partner Exchange BPX for any updates to this material http bpx okidata com...
Page 255: ...Page 151 Service Guide OF2200 2400 2600 Chapter A Board Diagrams A 2 INDEX TO CHARTS...
Page 256: ......
Page 259: ......
Page 262: ......
Page 265: ......
Page 268: ......
Page 273: ......
Page 276: ......
Page 279: ......
Page 284: ...Partner Exchange BPX for any updates to this material http bpx okidata com...
Page 285: ...Page 162 Service Guide OF2200 2400 2600 Chapter A Board Diagrams Okifax 2200 1 of 5...
Page 286: ......
Page 288: ...Page 163 Service Guide OF2200 2400 2600 Chapter A Board Diagrams Okifax 2200 2 of 5...
Page 289: ......
Page 291: ...Page 164 Service Guide OF2200 2400 2600 Chapter A Board Diagrams Okifax 2200 3 of 5...
Page 292: ......
Page 297: ......
Page 299: ...Page 168 Service Guide OF2200 2400 2600 Chapter A Board Diagrams Okifax 2400 2600 2 of 6...
Page 300: ......
Page 302: ...Page 169 Service Guide OF2200 2400 2600 Chapter A Board Diagrams Okifax 2400 2600 3 of 6...
Page 303: ......
Page 307: ...Page 172 Service Guide OF2200 2400 2600 Chapter A Board Diagrams Okifax 2400 2600 6 of 6...
Page 308: ......
Page 317: ......
Page 320: ......
Page 323: ......
Page 326: ......
Page 329: ......
Page 333: ......
Page 337: ......
Page 340: ......
Page 344: ......
Page 348: ......
Page 352: ......
Page 355: ......
Page 359: ......
Page 363: ......
Page 367: ......
Page 371: ......
Page 374: ......
Page 380: ......
Page 387: ...Page 199 Service Guide OF2200 2400 2600 Chapter B Illustrated Parts...
Page 389: ...Page 200 Service Guide OF2200 2400 2600 Chapter B Illustrated Parts...
Page 391: ...Page 201 Service Guide OF2200 2400 2600 Chapter B Illustrated Parts...
Page 395: ...Page 202 Service Guide OF2200 2400 2600 Chapter B Illustrated Parts UST500...