Deutsche Telekom - Glasferausbau

[Patrick M. Hausen]

I see 2 pairs/4 wires 😉

Your DSL line needs only one of those pairs. I would replace the TAE outlet with a 2x RJ45 one, connect pins 4 and 5 on each with one pair, and make sure DSL still works.

To prepare for the fibre connection you can then pull the unused pair from the LSA connector and extend it to a length reaching out of that box and leading to the modem. E.g. cut the plug from one end of an RJ45 patch cable, connect lines 4 and 5 to that free pair, done.

Make sure to get the modems with RJ45 if you go that way.

TAE replacement - make sure to get "ISDN" outlets with screwed connections, so you won't need an LSA tool:

- in wall: https://www.inline-info.com/InLine-ISDN-Anschlussdose-2x-RJ45-BU-Unterputz-Schraubanschluss-2x-8-fach
- on wall: https://www.inline-info.com/InLine-ISDN-Anschlussdose-2x-RJ45-Buchse-Aufputz-Schraubanschluss-2x-8-fach

To extend the wires in the box these come in handy:

https://www.amazon.de/ScotchlokTM-Einzeladerverbinder-Schwachstromverbinder-Signalkabel-Kabelschnellbinder/dp/B0972RRXGC

HTH,
Patrick

[chemlud]

Yepp. two pairs, as currently two different Telekom accounts, one analog number (really!) and one DSL line.

As I wrote above, the "unused" pair of cabels (after switching the analog account to fiber) does not end in the correct room. Only the DSL pair of cables (I want to have functional even after fiber established) ends in my office, therefore I will have to connect these modems to the same two cables my DSL is delivered nowadays and should be delivered in the future in parallel to the fiber connection.

Both, DSL and and fiber, should use the same pair of cables in the end.

[Patrick M. Hausen]

Difficult but not impossible.

Use the DSL pair of wires to connect a pair of those modems. You now have a Gigabit Ethernet connection which is VLAN transparent between the two ends.

Move the external DSL modem (you have one, right?) to the wiring room, mount a new on wall TAE, lead the two wires for DSL to the TAE and connect the DSL modem.

Connect the ONT to the fibre line, also in the wiring room.

Now you have one Ethernet but two uplinks. So the missing piece is a small VLAN capable switch like a Mikrotik Hex.

You will need an LSA+ tool and a bit of experience with these things, some phone wire, a TAE outlet and some of the connectors I linked above.

If you don't know which pair (1 or 2 on the LSA) is DSL and which is phone you also need a wire identifying device. IIRC I also linked one, already.

Or given you have an LSA tool to reconnect, gently pull one wire and check which service (phone or DSL) fails.