IBM ADSL Bridge/ Router Heritage - Manual (Page 164)

Heritage Series ADSL Bridge/ Router
A-15 Appendix
An RJ-11 wall jack usually has four pins; an RJ-45 wall jack usually
has eight pins.
WAN
Wide Area Network - A network that consists of nodes connected by
long-distance transmission media, such as telephone lines. WANs can
span a state, a country, or even the world.