Asterisk Shared Line Appearance and Polycom IP601

On a Polycom IP601 – how do i change the LED State to Flutter when state changes to “Hold” vs. always showing up as a solid red LED when the state is “InUse” and “Hold”.

Idle phones don’t know if they should pickup calls that are on “hold” because the “hold” light pattern is the same as the “InUse” light pattern and without station privacy all phones can jump into the conference bridge and interrupt conversations (that’s an old school PBX function).

demo*CLI>
    -- Executing [station1_line1@default:1] SLAStation("SIP/1000-098ca500", "station1_line1") in new stack
    -- Stopped music on hold on SIP/9999-098a5a40
 Extension Changed station1_line1[sla_stations] new state InUse for Notify User 1000
 Extension Changed station2_line1[sla_stations] new state InUse for Notify User 1001
 Extension Changed station3_line1[sla_stations] new state InUse for Notify User 1002
 Extension Changed station1_line1[sla_stations] new state Hold for Notify User 1000
 Extension Changed station2_line1[sla_stations] new state Hold for Notify User 1001
 Extension Changed station3_line1[sla_stations] new state Hold for Notify User 1002
    -- Started music on hold, class 'default', on SIP/9999-098a5a40
demo*CLI> sip show subscriptions
Peer             User        Call ID      Extension        Last state     Type            Mailbox  
10.5.0.174       1001        d55568b9-52  station2_line1@  Hold           xpidf+xml       <none>   
10.5.0.172       1002        4909c560-68  station3_line1@  Hold           xpidf+xml       <none>   
10.5.0.174       1001        8dd5f63f-15  702@default      Idle           xpidf+xml       <none>   
10.5.0.174       1001        dadebaac-38  701@default      Idle           xpidf+xml       <none>   
10.5.0.174       1001        615258e5-aa  1000@default     Idle           xpidf+xml       <none>   
10.5.0.153       1000        68151d68-d4  station1_line1@  Hold           xpidf+xml       <none>   
6 active SIP subscriptions
    -- Executing [station1_line1@default:1] SLAStation("SIP/1000-098c8f70", "station1_line1") in new stack
    -- Stopped music on hold on SIP/9999-098a5a40
 Extension Changed station1_line1[sla_stations] new state InUse for Notify User 1000
 Extension Changed station2_line1[sla_stations] new state InUse for Notify User 1001
 Extension Changed station3_line1[sla_stations] new state InUse for Notify User 1002
demo*CLI> sip show subscriptions
Peer             User        Call ID      Extension        Last state     Type            Mailbox  
10.5.0.174       1001        d55568b9-52  station2_line1@  InUse          xpidf+xml       <none>   
10.5.0.172       1002        4909c560-68  station3_line1@  InUse          xpidf+xml       <none>   
10.5.0.174       1001        8dd5f63f-15  702@default      Idle           xpidf+xml       <none>   
10.5.0.174       1001        dadebaac-38  701@default      Idle           xpidf+xml       <none>   
10.5.0.174       1001        615258e5-aa  1000@default     Idle           xpidf+xml       <none>   
10.5.0.153       1000        68151d68-d4  station1_line1@  InUse          xpidf+xml       <none>   
6 active SIP subscriptions
demo*CLI>