on the doc you provided on page 4
Avaya 4630SW IP Telephone (Avaya Communication Manager only)
2.0.2
Open standard works if you have a third party license you can use a different h.323 phone then Avaya but that doesn't mean that you can use any avaya phone or ANY other H.323 phone.
would be nice but just doesn't work
Joe W.
FHandw., ACS
If you can't be good, be good at it!