berger@clio.las.uiuc.EDU (03/31/88)
Often, the second line is the outer pair (yellow/black) of conductors, while the primary line is the inner pair (red/green). The wider jacks are frequently wired the same way, unless other options are present. If you plan to use the primary line for dialing out, you may just be able to plug your cable into the jack, provided your modem doesn't connect the black/yellow wires, or use them for A1 switching, etc. Mike Berger Department of Statistics Science, Technology, and Society University of Illinois berger@clio.las.uiuc.edu {ihnp4 | convex | pur-ee}!uiucuxc!clio!berger