The above picture shows rows of Line Switch Modules (LSM's) neatly lined up awaiting their fate. This scene reminds me of what it looked like when we were installing the AXE switches. Sadly, this once busy switch is now being dismantled with its subscribers and their traffic already having been migrated to a Next Generation (Voice over IP) based node. The above AXE10 was a fantastic switch and carried traffic in service for over 20 years without any outages.
This is a microcomputer unit from the Ericsson ROF 137 7852/1 R4B SLCT3 card. Card manufacture date is 1997 week 22.
Chip manufacturer: Motorola.
Category: 8-bit HCMOS microcomputer unit.
Introduction Technology: high-speed and low-power MCU; enhanced 16-bit timer system with four-stage programmable prescaler; power saving STOP and WAIT modes; serial peripheral interface (SPI); 256 bytes of static RAM; eight-channel 8-Bit A/D converter
Max. clock frequency: 2 MHz
This card now labeled ROF 137 1533/1 R2B/A LTC has 99W01 as its manufacturing date but a side label shows the original manufacture
date printed F3 8412 (1984 Week12 from factory F3).
I am guessing that this card started out life as an R2B and was sent back to Ericsson (or to a 3rd party) on 1999W01for modification & upgrade to R2B/A.
1984 Week12 is sometime from Monday 19th to Sunday 25th 1984.
If we decide the card was manufactured on the Monday then the approximate duration calculation results are;
From and including: Monday, 19 March 1984
To and including: Friday, 9 September 2011
Is 10,036 days from the start date to the end date, end date included.
Or 27 years, 5 months, 22 days including the end date
Alternative time units
10,036 days can be converted to one of these units:
1433 weeks (rounded down)
Yep, AXE10 is getting old!... but its still in service. The above card went down with worn out relays. It was repaired and sent back out to its site in Denmark. I hope shes in service for another 27 years!
Duration calculation by: http://www.timeanddate.com/