it's been several years since I last installed a multi-line system. I used to have a list of 800 and 877 numbers I could call that would read back the phone number of the line I was calling from. I can't find the list and have been called in from semi-retirement to install a simple AT&T 1080/1070 4 line system. I need help in identifying the numbers at the interface. Can someone help me. I work for Coast Electronics in Morro Bay, Ca. 805-772-1265. My supervisors are John Weiss (owner) and Jon (Woody) Wordsworth.