EMS HSD series User Manual page 22

HSD Aeronautical Transceivers
The default parameters of V.120 limit the maximum transit
size of the data package to approximately 1764 bytes
causing poor performance results over satellite ISDN
networks.
Improve the performance of V.120 over satellite ISDN by
changing the default parameters. Increase the maximum
size of data allowed in transit at one time to a value up to
approximately 8000 bytes. (Some applications of V.120
permit the user to change the 'window-size' just for this
purpose.)
When choosing an ISDN protocol for satellite ISDN
networks consider a flexible solution that allows for
modifications to the operating parameters to suit the unique
environment of satellite ISDN.
System performance also depends on which operating
system you are using. At the time of printing, Windows
2000 is recommended for optimal performance.
For more details, refer to the Troubleshooting section.
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Copyright © EMS Technologies Canada, Ltd.
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