[TUHS] Known Specimens of Pre-5ESS UNIX Telephone Switching Software?

steve jenkin sjenkin at canb.auug.org.au
Tue Sep 26 12:13:29 AEST 2023

For those playing along at home, 
“Gecko” was written up.

Virtual Data Warehousing, Data Publishing and Call Detail 

and a conference paper of the same name

Databases in Telecommunications: International Workshop, Co-located with VLDB-99, Edinburgh, Scotland, UK, September 6th, 1999. Proceedings

> On 26 Sep 2023, at 11:50, Andrew Hume <andrew at humeweb.com> wrote:
> i’m sure there are standing references to all this. but as i recall,
> the 5ESS was a more or less local switching system.
> the guts of the long distance network were embedded in the (roughly) 140 1ESS’s. they ran
> a completely separate (and substantially older) code that supported things like SS7 (signaling code
> that was NOT embedded in the voice channel). the 1ESS was a complex piece of equipment.
> my interaction with this was tangential. throughout the 1980-90s, i had a tight grip on how
> accounting messages were handled within AT&T and wrote some C code that handled a
> a transition from one level of the standard software to another level. and that code ran inside
> the 1ESS.
> but this was a long time ago.

Steve Jenkin, IT Systems and Design 
0412 786 915 (+61 412 786 915)
PO Box 38, Kippax ACT 2615, AUSTRALIA

mailto:sjenkin at canb.auug.org.au http://members.tip.net.au/~sjenkin

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