Hint/state_interface of public number in local queue

Hi,
I’m looking for information how to build queue. I have to put an public number as queue member and this part is easy. I have to put local channel with this number as interface like, local/PSTN@dialout-queue

But how to configure queue to set property state of interface to know that if this channel is ‘not in use’, ‘ringing’ or ‘inuse’. This is possible ?

I solved my problem with custom hints. For member i set state_interface like Custom:PSTN_NUMBER and then in dialplan i used Set(DEVICE_STATE(Custom:PSTN_NUMBER)=RINGING/NOT_INUSE/INUSE) and it works as i want, i see in queue show command status of public number in my queues

Hello,

We have exactly the same issue, could you add more examples and details with the diaplan and queues configuration you have done to solve the problem ?

Thanks