direct link service (DLS) definition
direct link service (DLS) means a data communications service which makes no attempt to automatically correct errors, detected or undetected, at the link layer of the air- ground communications path;
direct link service (DLS) means a data communications service which makes no attempt to automatically correct errors, detected or undetected, at the link layer of the air-ground communications path (Error control may be effected by end-user systems);