Yep, that’s right. The easiest way will probably be to use the existing network cable as a pull-in cable for the two new network cables (i.e. attach the two new network cables to one end of the existing cable and then work in pairs, one pulling on the old cable and the other pushing on the two new cables, pull through). Normally 2 network cables fit well into the inserted pipes. And then of course attach an RJ45 connector to both cables at both ends 😉

Thomas

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@Klingo wrote:

…
It’s just stupid that for this application two Ethernet ports have to come out of the wall (i.e. would be forced to 100MBit connections) which would then make any Internet bandwidth over 100MBit absolutely pointless in this setup.

…

@Klingo

This setup is also problematic with smaller Internet bandwidths because speed and/or duplex mismatches often occur when devices with Giga Ethernet ports are only connected with 4 wires.

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19 days later

@Insomnia wrote:

Can I also use this SFP adapter instead of the Cisco?

[https://www.pc-ostschweiz.ch/de/TP-Link-TL-SM321A-SFP-Modul-1000BASE-BX-2a15441286.htm](https://www.pc-ostschweiz.ch/de /TP-Link-TL-SM321A-SFP-Modul-1000BASE-BX-2a15441286.htm)

Is your question about Swisscom’s proposal for adapted network cabling with a fiber optic connection and media converter?

If yes, then

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Hi Insomnia

I planned to do some more tests in the next few days. Then I can probably answer your question better. Which Internet box model (IB Standard, IB Plus, IB 2) do you have?

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I’m getting the new Internet Box (IB 2) this week, ordered with the One package. But I haven’t yet ordered the components I need for the adjustment.

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@Insomnia:

On the topic “Swisscom proposal for adapted network cabling with fiber optic connection and media converter”

I did some more tests today to test the results of my thread in the specified thread (link: [here](https://community.swisscom.ch/t5/Diskussionsen-%C3%BCber-das-Thema/Glasfibrillanleitung-einer-Internet -Box-using-media-converter/m-p/484604#M1519 Understand the tests mentioned better to be able to. However, the result is different than I actually expected; it doesn’t “explain” the old results. But that’s not directly important to your question.

With the Internet-Box 2 (firmware version 08.01.12 / 08.01.00) and a TP-Link Gigabit Media Converter MC220L (hardware version 2.23) the following 1000Base-T SFP transceiver modules worked for me:

  • Cisco Systems, GLC-T, 30-1410-03 (Link source: here)
  • Flexoptix, 1000Base-T COPPER SFP 100 m, RJ-45, Autoneg, SERDES, No RX_LOS, T.C12.02.A (Link source: here). These modules can be configured with a special device (Flexbox) for compatibility with various “original products”. The following configurations were tested: 1) “Cisco Systems, GLC-T”, 2) “Cisco Systems (ex. Linksys), MGBT1”, 3) “Default, T.C12.02.A” and 4) “Cisco Systems , SFP-CU-RJ45”. These four Flexoptix variants all worked.

Didn’t work for me:

  • Cisco Systems (Small Business, ex LinkSys), MGBT1 (Link source: here.

It is not possible for me to estimate whether the manufacturer-compatible 1000Base-T SFP module you specified would also work. It certainly doesn’t have to be an “original Cisco SFP”. I can recommend the company Flexoptix (D) (working products, competent, friendly, fast delivery). However, in addition to the purchase price and transport costs of approximately CHF 22, there are also “customs” costs of almost CHF 30, which makes the total price no cheaper than the Cisco GLC-T module from Steg-Electronics.

Another important point: A “Gigabit Ethernet” capable cable (i.e. Cat . 5 or better, max. 100 m), all 8 wires must be wired. Unfortunately, there are still house installations in which only 4 wires are wired to the RJ-45-Anschluss (e.g. “split installation” with an 8-core cable that is routed to 2 RJ45 sockets with 4 wires each). There are several threads on this topic in this forum (e.g. included in the thread with link: [here](https://community.swisscom.ch/t5/Diskussions-%C3%BCber-das-Thema/Media-Converter-gt -Ethernet SFP module f%C3%BCr internet box standard/m-p/438986#M929 “https://community.swisscom.ch/t5/Diskussionen-%C3%BCber-das-Thema/Media-Converter-gt-Ethernet-SFP-Modul-f%C3%BCr-Internet-Box-Standard/m-p/ 438986#M929”). Such a cable only allows “Fast Ethernet” (i.e. max. 100 MBit/s). Since the MC220L can only work with “Gigabit Ethernet”, such a connection will not work at all.

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@rokx

Thank you for your detailed answer. I have now ordered the modules, let’s see if it will work.

I am aware of the problems with the house cables because you described them well in the forum. However, it’s not entirely clear to me how I can test this. So how do I know whether the 8-wire cables are installed in my sockets, which are in every room?

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@Insomnia wrote:

I am aware of the problems with the house cables because you described them well in the forum. However, it’s not entirely clear to me how I can test this. So how do I know whether the 8-wire cables are installed in my sockets, which are in every room?

The easiest way is to attach a PC to the end of the LAN cable and start the speed test in the Internet box menu, then you can see whether it is a Gbit/s network.

In the picture below, the home network (marked yellow) only has a 100 Mbit/s cable from the Internet box to the PC.

speedtest-intern.JPG

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Installationen, Netzwerk, Internet, Computertechnik, OS Windows, Apple und Linux.

    WalterB

    Well, then I probably only have the cheaper version:

    Print Screen.jpg

    I’ll probably have to put in a new cable… But then I won’t need to buy the components. Also has an advantage…

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      @Insomnia wrote:

      Well, then I probably only have the cheaper version:

      I’ll probably have to put in a new cable… But then I won’t need to buy the components. Also has an advantage…

      It is important that the LAN cable from the socket to the PC also has 8 wires and the PC has a 1 GBit network card.

      It’s best to do this test again directly with your PC or notebook on the LAN Anschluss from the Internet box to compare.

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      Installationen, Netzwerk, Internet, Computertechnik, OS Windows, Apple und Linux.

      @Insomnia wrote:

      Well, then I probably only have the cheaper version:

      …

      I’ll probably have to put in a new cable… But then I won’t need to buy the components. Also has an advantage…

      That’s bad luck. Just to be on the safe side, a question: Have you done the same speed test with a normal LAN cable (8-wire, Cat.5) between the PC and IB2 and seen the full 1Gbit/s “in the home network” too?

      Addendum: Sorry, @WalterB I only now saw your post “on the next page”.

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        rokx

        Just tested it, network card is one Gbit and cable is also suitable. Transfers well straight away. Now I have to open the can to look inside.

        Can is open. Both RJ45 ports are occupied, but of course I don’t know which cable is behind them. Now how can I remove this from its holder?

        IMG_6365.JPG

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            @Insomnia wrote:

            They probably split:

            As a result, an 8-wire cable was pulled in but distributed again between the two LAN sockets, so it should be possible to install only one LAN socket with 8 connections in the basement and in the living area.

            The disadvantage is that it only has one LAN socket, but you can then use a switch for several connections in the living area.

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            Installationen, Netzwerk, Internet, Computertechnik, OS Windows, Apple und Linux.

            @Insomnia wrote:

            Can is open…How can I remove this from its holder?

            You have to take out the central screw in the middle of the 3 sockets on the left. Then all the white covers come off.

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            ….keep on rockin' 🤘🏼🤘🏼🤘🏼

            @WalterB wrote:

            @Insomnia wrote:

            They probably split:

            As a result, an 8-wire cable was pulled in but distributed again between the two LAN sockets, so it should be possible to install only one LAN socket with 8 connections in the basement and in the living area.

            The disadvantage is that it only has one LAN socket, but you can then use a switch for several connections in the living area.

            Yes, I’ll look into that. But doesn’t the Swisscom solution of moving the IB2 into the living area require 2 LAN plugs?

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