In some FttH networks, a IEEE standard is used where traffic in both directions 
is using a single strand of glassfiber on different wavelengths. The upstream is
 using 1310 nm, while the downstream uses 1550 nm. This is an example of a 
bidirectional connection using an underlying undirected medium.

In some FttH networks, a IEEE standard is used where traffic in both directions 
is using a single strand of glass fiber on different wavelengths. The upstream 
is using 1310 nm, while the downstream uses 1550 nm. This is an example of a 
bidirectional connection using an underlying undirected medium.

In some FttH networks, a IEEE standard is used where traffic in both directions 
is using a single strand of glassfiber on different wavelengths. The upstream is
 using 1310 nm, while the downstream uses 1550 nm. This is an example of a 
bidirectional connection using a undirected medium.

In some FttH networks, a IEEE standard is used where traffic in both directions 
is using a single strand of glassfiber on different wavelengths. The upstream is
 using 1310 nm, while the downstream uses 1550 nm. This is an example of a 
bidirectional connection using an underlying undirected medium.