[asterisk-users] how to indicate an non-existent number?

[Louis-David Mitterrand]

Hello,

Using a PRI (E1) with the euroisdn protocol, I don't seem to get any 
specific message from the telco when attempting to dial a non-existent 
number. Asterisk returns a busy/congested code, but nothing indicating 
the number's real status.

How do you guys manage that issue? Do you record a message ("sorry, the 
number dialed can't be completed") and play it when the PRI or BRI 
returns a specific code? And what code is that?

Thanks in advance for any insight,