POSTNET Allow B and B' Fields Definition: If U.S. Post and POSTNET are enabled, and POSTNET Allow B and B' Fields is enabled, the imager will allow B and B' fields in POSTNET symbols. Serial Cmd: <K460,postal symbology type,POSTNET status,PLANET status,USPS4CB status,POSTNET allow B and B' fields,Australia Post allow 0 FCC> Default: Disabled Options: 0 = Disabled 1 = Enabled