A relationship with a member of opposite
sex.
Verb: "to have broadband" is to be having a relationship.
It is effectively an analogy for relationships, with all things related to it corresponding to different parts of the analogy. "Service provider" being the girl or
boy you are with, "56k" is being not quite there yet, "laying cables" - meeting new people etc.
(So as to be discreet, a real company with the same initials as the girl or
boy you
fancy can be used in conversation, see below)
"You got broadband yet?" "
Nah, I'm still on 56k"
"Hows your broadband coming along?" "Slowly, I'm still looking for service providers..." "I thought you fancied Virgin Media?" "
Nah, he stopped liking
Vicky May ages ago!"