Comdial DSU and DSU II System Reference Manual page 135

This manual has been developed by Comdial Corporation (the
"Company") and is intended for the use of its customers and service
personnel. The information in this manual is subject to change
without notice. While every effort has been made to eliminate
errors, the Company disclaims liability for any difficulties arising
from the interpretation of the information contained herein.
The information contained herein does not purport to cover all
details or variations in equipment or to provide for every possible
contingency to be met in connection with installation, operation,
or maintenance. Should further information be desired, or should
particular problems arise which are not covered sufficiently for the
purposes, contact Comdial, Inside Sales
purchaser's
Department, P.O. Box 7266, Charlottesville, Virginia 22906.