Notifier DS-FM - Same Day Shipping (SEALED)A fiber option module converts one of the two digital audio ports on a DAA2, DAX, DS DB or DVC that mounts fiber option modules (DVC EMPCC version or later) from wire to fiber. One or two fiber option modules may be installed, converting the DAA2, DAX, DS DB or DVC partially or wholly to fiber optic communication. A DAL (digital audio loop) can support wire, single mode fiber, and multi mode fiber on the same loop with the use of fiber option modules.