This reference manual applies to the following system and telephone models:

System Models:

DSU systems with software 20A and later.

DSU II systems with software 4A and later.

Telephone Models:

Impact 8012S-** Rev. A and later.

Impact 8024S-** Rev. A and later.

Impact SCS 8324S-** Rev. A and later.

Impact SCS 8312S-** Rev. A and later.

Impact SCS 8324F-** Rev. A and later.

Contact your Comdial dealer for updates of this as well as other Comdial publications.

*Tri-Level Compression is a registered trademark of ACS Wireless, Inc.

Comdial® strives to design the features in our communications systems to be fully interactive with one another. However, this is not always possible, as the combinations of accessories and features are too varied and extensive to insure total feature compatibility. Accordingly, some features identified in this publication will not operate if some other feature is activated.

Comdial® disclaims all liability relating to feature non-compatibility or associated in any way with problems which may be encountered by incompatible features. Notwithstanding anything contained in this publication to the contrary, Comdial® makes no representation herein as to the compatibility of features.

2/12/97

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Vertical Communications DSU and DSU II manual System Models