XS4ALL Fiber optic link properties

The link is a single strand of single-mode fiber, with a different infrared laser wavelength going in each direction. A splitter prism inside each transceiver separates the two wavelengths;

1000Base-BX-10

To network (Up)From network (Down)
IEEE 802.3 IEEE 802.3
1000Base-BX-10-U 1000Base-BX-10-D
TX: 1310 nm TX: 1490 nm
RX: 1490 nm RX: 1310 nm

Specs

SC/PC connector

In theory, any fiber media converter which meets the above specs should work.

At my place, a ZTE ZXHN F3100 media converter is installed (powered by a 12V, 1A DC adapter);

ZTE ZXHN F3100 media converter

Some media converters require a separate Small form-factor pluggable transceiver (SFP), which plugs into the media converter;

TP-Link TL-SM321B SFP

You may need a LC to SC adaptor plus a LC to LC cord in order to connect to a SFP.
Some routers have SFP slots.

IPv6 Ready