It sure is for China.
Avaya has been making horrible equipment, especially for IP phones. If you want to make equipment that's closed source, closed to literally everything, require purchasing licenses just to add an extra phone and is incompatible with everything (Left overs from the Nortel era), what do you expect? They are still popular in the used phone system market, since they work good enough, but you no longer have support for it, other than your phone guy. Want to add a phone? What a big headache... Their much touted scalability is quite a sham when it requires a team of people just to add phones.
Meanwhile, I bought my office Yealink IP phones and they work great and literally compatible with everything, SIP (of course), including adding address books, supports VPN connections and very easy to manage. They also look great, sound great and the color touch screen is a big plus. They're not exactly cheap either. Yealink also doesn't handcuff me with licensing, restrictions and fees. Works great with Asterisk and I can add as many damn phones as I please.
People still need these phones, they're not going away any time soon, unless cellphones start linking your business phone extension, but a lot of people don't like doing that either. Much of the telecomms business moved onto VOIP providers, IP phones that work and your local IT support.