Inverse multiplexers are used, for example, to combine a number of ISDN connection is needed.
2.
An alternative to an inverse multiplexer is to use three separate links and load sharing of data between them.
3.
Note that, as with multiplexers, links are often used in bi-directional pairs and, at either end of the link, an inverse multiplexer will be combined with its reverse ( an inverse demultiplexer ) and still be called an " inverse MUX ".