Using LA's is the problem
If they need to know every line then program a group for every line and gives those groups names like line1 line2 etc etc etc
For using a certain line you need to program different prefixes.
You will need that with a PRI anyway.
Homo sapiens non urinat in ventum
honey, i fried the IP Office !!!
Sarcasm, it's only one of the services I offer.