Noob question regarding handsets

[FatNakedGuy]

I have the following handsets available to play with but am not sure if they will work. Can anyone tell me? Thank you!

Avaya 2410
Avaya 4406D+
Avaya IP400 Digital Station 16 port

 

[nb]

HI

If they support SIP, they should work yes. Can you post their web interface ? Save in mht format and attach.
I think you can start from the 2410 since you have them handy. If it supports sip it has no reason why it shouldn't register. You have to try it out - because if they work only with Avaya systems you'll have dysfunctions.