New technology components reduce component quantity and size and also increase component reliability . By using fewer, more reliable components and increasing the internal diagnostics, system reliability and robustness is improved. One new PWA replaces four old technology PWAs therefore fewer spares are required.

UDHP components are backward compatible with previous DHP releases.

• The UDHP replaces the existing CPU ROM, and both CMOS RAM cards in all three DHP types : DHP1, DHP2, and DHP2 w/Retry

• The single new PWA replaces the DHP PWAs by simply installing the PWA in the file.