No call log?

I'd assumed that the W52 would maintain a local call log, but the call history is always empty.

I have a pair of W52 phones connected to a Zycoo IP-PBX.

I do realize that the handset supports network call logs via the broadsoft software - that's not what I want. I just want to be able to get a list of made/received/missed calls by this handset (or the base station if possible).

Is there something that I've missed in the settings?