It says "Invalid number" when pressed to take a call or when trying to park a call.
I used the following value for the key/line which is working fine on SPA504G but not on this one (neither on SPA525G):
fnc=blf+sd+cp;sub=park+*5901@my.domain;ext=park+*5901@my.domain;vid=1
I used the following value for the key/line which is working fine on SPA504G but not on this one (neither on SPA525G):
fnc=blf+sd+cp;sub=park+*5901@my.domain;ext=park+*5901@my.domain;vid=1