Provides extra distance between analog voice communication devices.Extends phone signals up to 20 kilometers (12.4 mi.) over 1310-nm single-mode fiber.Works as FXO device for telephone devices in distant offices.Emulates central office (CO) or PBX equipment from the FXS side.Supports audio transmission and Caller ID capabilities.Pair with our TE164A-R2 for a standard loop extender application.Or order two converters for an automatic ring-down (ARD) application.