TRUE if Annex B ANFP functionality is enabled, otherwise FALSE. The gshdsl-standard-network-type must be set to European Annex B, and the port cannot be CPE. This field makes the modem perform in Annex B mode, but slightly differently. This is to comply with the UK ANFP requirements and pass the BTexact Technologies PSD measurement technique to meet BT approval. Only enable this field for that test specifically.