Custom extension per phone

[M4Next]

Hello,

I know how to use custom extensions into my dialplan, in order to - let’s say - activate a special welcome message in some situations :

exten = SetWereClosed,1,NoOp()
 same = n,Set(DEVICE_STATE(Custom:WereClosed)=INUSE)```

I also associate a phone button to this so that users can activate or de-activate, that is fine.

Now I’d like to have the same type of things, but per phone : set a button on each phone to have his incoming phone calls processed differently - for instance forwarded to a cell phone.
In term of dialplan, how can I define a Custom extension per phone ?
Something like :

${DEVICE_STATE(Custom:MySpecialAction_${PJSIP/${EXTEN}})}

Can an Asterisk variable name be composed of a fixed and a variable part ?

Or do I have to declare as many Custom extensions as the number of phones ?

Custom:MySpecialAction_001
Custom:MySpecialAction_002
…

Thanks !
Michel

[david551]

All extensions are custom in Asterisk.

@M4Next

Can an Asterisk variable name be composed of a fixed and a variable part ?

The quickest way to answer this would have been to try it, but Asterisk variable names can be macro expanded from other variables and functions.

[M4Next]

Thanks ! You’re not completely wrong