By the way someone ought to tell our in house PABX about the Gamma/Delta usage limitations in an office. I think about 100+ desks here have either a Gamma or a Delta on them and AFAIK they all work just fine?!?
Presumably though it works pretty much as any analogue extention on a PABX? And presuming a bit more, it doesn't make registration calls yet still works ;)
Cheers, James