Any of the above. Multiplexing allows several carrier streams to simultaneously use the same fiber. In most cases each of these streams will be multiplexed to carry a number of simultaneous voice or data streams. Frame Relay - A telecomunications protocol for economical transport of digital material. It is used for transmission between two sites on a LAN, or from a LAN into the Internet.
Frame can run over various transmission media.
Over high speed media, Frame Relay can simultaneously carry both voice and data communications. Passive means the system has no active components such as amplifiers, repeaters, hubs or switches. This transmission method is limited to about 12 miles. PON is a shared line, so actual subscriber performance depends on how many subscribers are on the line and how heavy their traffic is. PON is a relatively simple method of getting high speed connections out to more end users.