You are using the images at http://inf.imelda.be/downloads/m0n0wall/ right? 
The stock m0n0 1.2 image will not support those attributes.

                        Lee

From: "Jason Brunk" <jbrunk at wthosting dot com>

>I noticed this last night myself.  I am not getting called or calling
> station ids at all.  I am trying to figure out how to get calling and 
> called
> station ids to both be mac addresses.

> From: Andrew Hull [mailto:list at racc2000 dot com]

> Greetings,
> Using the esteemed Mr De Graeve's latest image, I have discovered a slight
> inconsistency.