End of sale by Avaya doesn't mean you can't get them. Personally I have a B129, B169 and B199 floating around my office.
- The B129 is attached to my PC as a USB device, and so working with Avaya Workplace as the app for making/answering calls.
- The B169 and B199 are on my IP Office test rigs. The display on the B199 and its related app are a bit gimmicky and don't really give you that much. The dockable charging plate of the B169 is very nice, can move the speaker around when in use and then park it in the corner to charge when idle.
They all have the same Knoftel hallmark of solid build quality and good audio (which are after all the base requirements that you want from conference phones). I would be sorely annoyed to lose the B129 and have to go back to a PC headset or the PC speakers.
Whilst in the area of former Avaya kit from the Knoftel marque, I also have an HC020 video camera on my PC and it kicks any other PC camera I've meet into touch. You can still find them for sale, they still seem pricey, but you are getting good value for money in my opinion. I also have a CU360 but that's a very different tale (excellent hardware scuppered by the enforced software).
Stuck in a never ending cycle of file copying.