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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
or
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:
301945-A
E-1