[Freeswitch-users] blf

Anyone got a basic description of how to setup blfs on snom 3xx phones. it works in a fashion, but If I make a call outside the network the blf does not illuminate. However, if I call the extension making the outbound call, then the lamp illuminates on all phones, some setting is missing somewhere. I am running 1.2.3, 20th of sept 2012. Darcy Primrose