Keith wrote:
  The center pair of wires are normally the first tip
& ring, with the
 next outside pair being the second line. On an RJ11, this is
 2&3(normally green & red) for the first, 1&4 for the second.(normally
 black and yellow) 
Well, actually the 6p2c RJ11 has only two wires for one line.  The
two-line four-wire on a 6p4c is an RJ14.  The three-line six-wire 6p6c
is RJ25.  The four-line eight-wire on an 8p8c (similar to RJ45) is RJ61.
  I *think* that Tony was originally referring to the RJ48S or RJ45S.
The pinouts are on the page I gave him before:
http://www.hvs.on.ca/telecom/technologies
Peace...  Sridhar