| 摘要 |
The invention provides a method for maintaining a connection to a relatively faster facsimile transmission line connected via a converter to a relatively slower facsimile transmission line, and in which the facsimile transmission on the relatively faster facsimile transmission line takes place in error correction mode (ECM). During transmission from the relatively slower transmission line to the relatively faster transmission line, the converter inserts a number of "dummy" frames, so that the time taken for the transmission and re-transmission of "dummy" frames plus the time for the transmission of valid frames plus the time for possible re-transmission of faulty valid frames on the relatively faster transmission line corresponds to the time taken for receiving valid data from the relatively slower transmission line. During transmission in the opposite direction, the converter inserts a number of "dummy" partial page requests (PPR), so that the time for the transmission of valid frames plus the time for re-transmission of the frames thus caused to be requested on the relatively faster transmission line corresponds to the time for the transmission of the frames on the relatively slower transmission line. |
