Re:from a former Nortel employee... (Score 2, Informative)

I am a current nortel employee and I work on the DMS-100 system. Just to give you an idea of the complexity: the product's 35 million+ lines of code (in a proprietary language called protel) have been written over the past 24 years. It came out in 1976 as the first digital switch. It is old and fussy and really, really hard to improve. The legacy problem strikes again.

a.c.