Please be advised that the PLDT interconnection facilities serving Northern Luzon is operating normally, contrary to an erroneous advisory issued by Globe to its subscribers yesterday (Feb. 27).   Other carriers  such as BayanTel and Digitel are not experiencing any trouble in the same interconnection gateway facility that Globe is using. This indicates that the interconnection problems being experienced by Globe in Northern Luzon are caused by problems in Globe's network and transmission facilities. PLDT has already invited Globe representatives for a joint testing to address their problems.