SPA504G phone change in phone behavior after firmware upgrade

Question

Hello,
     I have a SPA504G phone that was set up with a speed dial to 800 which initiates the page all feature of the phone.  On the previous firmware I ran (7.4.8) That light was in a solid green state.  I have recently upbraded to firmware 7.5.2b and now that key is blinking orange.  The key still functions as intended and the paging works but I need to know how to get this light to show up as green again.  Does anyone have any suggestions.  Below is the XML line that Im using for that line.
<Extension_4_ group="Phone/Line_Key_4">Disabled</Extension_4_>
<Short_Name_4_ group="Phone/Line_Key_4">Page</Short_Name_4_>
<Share_Call_Appearance_4_ group="Phone/Line_Key_4">private</Share_Call_Appearance_4_>
<Extended_Function_4_ group="Phone/Line_Key_4">fnc=sd;sub=[email protected]</Extended_Function_4_>
<Extension_4_ group="Phone/Line_Key_4">Disabled</Extension_4_><Short_Name_4_ group="Phone/Line_Key_4">Page</Short_Name_4_>
<Share_Call_Appearance_4_ group="Phone/Line_Key_4">private</Share_Call_Appearance_4_>
<Extended_Function_4_ group="Phone/Line_Key_4">fnc=sd;sub=[email protected]</Extended_Function_4_>

Answer 1

Extended_Function are big mystery for me. Despite documentation. Especially interaction's of sub= and ext= in combined functions (like blf+sd). And the behavior is changing between firmwares (no change in documentation, no notice in changelog), so my confusion seems not to be caused by my misunderstanding of documentation.
Try one of:
fnc=sd;sub=[email protected];ext=[email protected]
fnc=sd;ext=[email protected]
fnc=blf+sd;sub=[email protected];ext=[email protected]
It may or may not help. Note, the last one will monitor the state of 800 as well (if supported by PBX).