Avaya killed the Norstar / BCM line which still has a lions share of the marketplace only to force them into an Avaya product or lose the business to competition. Same goes for the Nortel CS1000 and CallPilot. There are a ton of Meridian Mail and CallPilot voicemail ports out there.
Avaya made the same huge mistake that Nortel did of not building on the Nortel data gear.
I still work in the business and customers love the Nortel products. Now sadly many global customers who have Nortel gear or Avaya Blue are moving to Cisco. Cisco isn't doing that great with their layoffs either.
Avaya should have kept the door open for 15 years on all Nortel products to keep the cash coming in.
Each time a patch is released by Avaya I wonder what else it will break. Nortel systems were primarily running on VxWorks on the large systems.
The truth is that hospitals are not going to put ip phones in rooms. There is a enormous amount of TDM customers out there that do not have the financial ability to forklift upgrade to IP or cloud based systems.
Once again a true reflection of mismanagement by listening to marketing rather than engineers and the customer base.
I hope @OjGujsb-bhou does not mind me putting this in a thread, so more people can see it. Really good point.