everybook offers this.
most books offer:
wagering from your cell phone, office phone, home phone, friends phone, or pay phone.
they also offer wagering from laptop computers, desk top computers, office computers, home computers and school computers.
they even offer intercom wagering at some books. It is fairly complicated but I will try to explain.
end user > Intercom transmitter > Intercom reciever > input user > computer interface > Internet transmission > Internet reception > Bookie
end user (you) intercom your buddy and your buddy puts the bets in the computer, your buddy intercoms you back to let you know the bets have been placed.
this is the latest thing, very expensive and only the top tier books offer it.
good luck