Nortel was an unbelievable loss. To this day you still see Nortel phones in every corner of the world. If they hadn't over-extended themselves they'd probably still be on top of that market.
Even more disappointing was that RIM/Blackberry had every opportunity to take that mantle (business/enterprise IP telephony) and didn't even try.
Even more disappointing was that RIM/Blackberry had every opportunity to take that mantle (business/enterprise IP telephony) and didn't even try.