Hi,
I've just added a 4th handset but I don't have full functionality.
Most notably I have no call log available on it and additionally calls made on the additional handset are not included in the log on other handsets.
Something else strange was I had to deregister handset 5 to register (there is also a handset 4 registered) although this was a trio system and there has never been 5 handsets.
It's not the end of the world but it would be nice to have this function working.
