User guide

301945-A

E-1

Appendix E

Parts and Part Numbers

This appendix provides summary information for the following topics:

• Part numbers: the common part number format; legacy part numbers; tabbed

part numbers

• When to update the minor rev of a part number for different types of parts:

programmed parts, PCB assemblies, custom parts, purchased components

• BOM structures

• Class codes

Part Numbers

Common Part Number Format

Bay Networks now uses a new

common part number format

in the form:

Number-Letter

123456-A

All engineering tools support this format (and existing ones). New parts numbered

after October 31, 1997 use only the new format and are generated in ranges

starting at 200000-A and 300000-A, respectively, for (a) Santa Clara campus and

West Coast acquisitions and (b) Billerica campus and East Coast acquisitions.

The 7th character ranges from A to Z and designates the major version for all parts

including standard purchased parts: