Easy Tiger no need for capitals, I come in peace - I appreciate your correct in line with the meaning of landside areas however I cannot see what else it refers to. Some DCS systems have ability to send acars messages but I doubt this is what it refers to. Anyone else like to hazard a guess.
Re caution - select the advanced search function on this site and type in Aviation Support (search flight/ ground ops forum only). Read other people's posts and then feel free to come to your own conclusion.
Take Care
SG