I've done a reasonable amount of telephone premisis wiring and installation, and have a challenge coming up.

One of my commercial accouts is "re-doing" the control center in their batch paving plant...

I need to identify which pairs go to which line. Carpenters and others have cut cat3 lines, and, perhaps colorblind others, have tried to reconnect....

What is the "official" name for the number which you dial to determine which telephone line you are connected to? I have the number for some of our local telco's, but not this one. Is there any "standard" like 411 etc. that is common?

Thanks for your help!

Grov