Question about CALLERID(name)

Hi, I know CALLERID(NUM) display the number who is dialing, but for example.
If i configure a context for incoming calls via PSTN via analog port what CALLERID(NAME) will display? The number too?
exten=>s,n,NoOp(${CALLERID(name)}) <— What this will display on incoming call via analog PSTN?

Depends on what the network sends and probably whether caller ID protocol supports the name at all. You won’t get useful names from BT in the UK.