Release 10.1A: Progress Fathom Replication
User Guide

Additional references

For additional information about estimating network bandwidth, refer to the following sources:

Unix Network Programming, Prentice Hall Software Series, By W. Richard Stevens, Copyright 1990 ISBN 0-13-949876
http://www.stallion.com/html/support/glossary.html#T - Definition of T1
http://www.strategicwebventures.com/definitions/Glossary/T1