[rescue] AT&T 3B2 revival

Sandwich Maker adh at an.bradford.ma.us
Tue Aug 18 17:45:39 CDT 2015

On 08/18/15 10:53 AM, Alan Hightower wrote:
" > []
" > Ed Eckert, the chief archivist for Alcatel-Lucent claims much of the
" > original techincal documentation on the machine is in safe hands and not
" > in any danger of being lost. But he still considers it
" > proprietary,confidential, and not currently suitable for
" > reclassification for public release. He suggested I reach out to George
" > Kupczak at the AT&T Archives in Warren, NJ which I have not done yet.
" That is an interesting bit of information that I was not aware of.
" I'm aware that they own the information, but, how long has it been since the 
" last 3B2 rolled off of the assembly line? 20, 25 years?

remember, the 3b architecture was developed for the controller of the
3ess, and telephone switchgear lasts a *looong* time; we designed for
20-year 24x7 uptime.  the 4ess, also using a 3b20d main controller,
was made from '76 to '99, and there are still some 100 in service,
with plans for a next-gen 4ess.  the 5ess, still in production, has a
3b21d 'administrative module'.

the 3b20d and 3b21d are, in telcom style, completely double-redundant;
you can walk up to one and pull any board at random without affecting
operation.  they, and their relevant intellectual property, won't be
obsolete any time soon.
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh at an.bradford.ma.us                       and think what none thought

More information about the rescue mailing list