LAN (Laboratoire Des Applications Numériques, The Digital Applications Laboratory) is a company specializing in interoperability testing of DSL equipment associated with telephone operators and end-users. It is engaged in interoperability activities around copper and fiber access networks by developing its test services around the coming technologies including FTTdp, G.fast, XG-PON1 and Next Generation Passive Optical Network known as NG-PON2.