I'm configuring 4 SPA504G with expansion-module 500s in a UC560 system, and buttons on module with monitor/watch line or blf don't show LED. I see only red color for busy line. But available green led and orange ringing led? Any Bug or special configuration?
Maybe SPA504G and 500s in not SIP mode but in (SPCP) does't show it?
Thank you
Matteo