Cable conection for a mobile device in a restuarant NO WAY
sms you need a phone service conection and dail up everytime cost money and not handy in a restuarant even when you automize the dailing
a central installed IR reciever in the restuarant and muliple transmitters in the hand held device (faced in several direction) might do the job
i't's then only coding and decoding of the information
Robert-Jan
Ps: stick to the normal writing style if you ask a question in the forum, some members take it as offencive the way you write and thus it will limit your responses on the question