It should also be mentioned that if you are using MAT or OTM that the software will be terribly confused by ASR. MAT/OTM will not know what to do with the record of the set at the old TN and will not create a new record of it at the new TN. You will have to delete the set from MAT/OTM and then do a retrieve or a reconcile in order for the set to be correctly reflected in MAT/OTM's station manager.
Plus, although this may seem obvious it is worth mentioning just in case, ASR works only with phones on the same switch (Duh!). It will NOT work between networked switches or similar ilk.
SD