Not sure what a T105 is. But if on an Aruba controller, see below.
Are you sure the phones aren't connected? They might be connected but not getting an ip address. Check the station-table for the missing clients.
show station-table verbose
If that doesn't help, what kind of security are they using? dot1x, psk or other?
Checking the logs for possible clues.
show log errorlog 50
show log user 100
...
Next start up a user-debug, that should more than likely pop up a few hints as to what is going wrong.
configure terminal logging level debugging user-debug <mac>
show log user-debug 100
show auth-tracebuf
If that still doesn't help you resolve the issue, get back here with that output and some more info about your setup and we might be able to help. If urgent, open a support case at the same time.