There is a constant need to deliver a rather small quantity of analogue POTS telephones over the fiber, or large, up to 360 and more and sometimes along with Ethernet and E1 over the same fiber. Here you will find all you need for this purpose. In other words, sending voice over fiber directly still matters!
2, 4 or 8 port RJ-11 telephone & Gigabit Ethernet port over Fiber Multiplexer
1, 2, 4, 6, or 8 port RJ-11 type Telephone POTS FXS/FXO & Ethernet 10/100 to Fiber Optic Converter
2 Voice (FXS/FXO) POTS fiber multiplexer / converter, with additional Ethernet port
4 Voice (FXS/FXO) POTS fiber multiplexer, 1 x Ethernet port as option
8 Voice (FXS/FXO) POTS fiber multiplexer, Ethernet & E1, serial ports as options
16 Voice (FXS/FXO) POTS fiber multiplexer
360 Voice (FXS/FXO) POTS phone over fiber multiplexer