In reply to a post by eckiedoo:

If the bare terminals and screws on the Terminal Block/Connector Strip are safe yet completely exposed and accessible (can be touched),

The OP has repeatedly stated that bell circuit is 230V mains [gasp].

In reply to a post by XRaySpeX:

In reply to a post by konrado5:

Because it doesn't matter. It goes to the right to my router to the other room (about 5 metres long).

You have no actual telephone then?

Yes, I don't have any phone.

How do you know what matters when you are asking us for advice?

Because I know this cable is not related to doorbell.

In reply to a post by XRaySpeX:

From what's been said by OP, the round box is a phone line Block Terminal Connector connected to the horizontal phone line going L under the 2 vertical pipes (all photo gr7) and then coming out other side of wall in adjacent room (photo xvqe) where it turns R, as you look at it, to a rather large phone socket at the top of which you can just make a RJxx type socket receiving the long phone cord to where the OP presumably has a dangler filter or splitter.

Both photos are from the same room.

In reply to a post by konrado5:

Because I know this cable is not related to doorbell.

But it is the cable that is carrying the BB signal that results in the Error Seconds that you complain of in your OP:

In reply to a post by konrado5:

I've noticed that always when doorbell rings my router reports 1-2 errored seconds.

How can it not be related?

Then the topology doesn't make sense. In the 1st photo cable is going to L; in the 2nd it is coming from L. Unless 1 of the photos is upside down.

But it doesn't really matter as it's all one cable.

In reply to a post by XRaySpeX:

But it is the cable that is carrying the BB signal that results in the Error Seconds that you complain of in your OP

But it is cable from phone socket to my router, this cable is far from ring cable. If my doorbell causes interferences, it is not by this cable.

In reply to a post by XRaySpeX:

Then the topology doesn't make sense. In the 1st photo cable is going to L; in the 2nd it is coming from L. Unless 1 of the photos is upside down.

But it doesn't really matter as it's all one cable.

I'm also surprised, but my ISP made such installation.

OK, A couple of questions for clarity:

1. How far apart are the (doorbell, round box, connector block) and the broadband/phoneline connection box?

2. Did your ISP install the broadband/phoneline box ONLY? And is that why it is not painted pink?

I agree fully with you that the topology does not make sense.


And with Konrad's latest revelations suggesting that the Mains MAY be connected directly on to the PSTN wiring ...

( I would like to see Openreach's reactions to any of us proposing or actually doing similar!)

Konrad in a recent posting has said that the two photos are taken in the same room, apparently confirming the close proximity of all of the illustrated wiring and apparently the same pipe appearing in both; but has not been able to supply the requested third photo attempting to show all, whether that be at a"normal", solid 90 degrees to the wall or from further away at an oblique angle.

=====================

As his knowledge of "technical" English seems limited, I did try doing a Google Polish Translation followed by a translation back in to English, to try to ensure the accuracy of sense.

The actual Translations were successful; BUT on doing a COPY/PASTE of the Polish in to TBB Post box, the accented Polish characters came over as their "Extended ASCII" Codes, ie the numerical representation of them.

The COPY/PASTE was direct from Google Translator to TBB, so I must try going via WORD or similar.

So maybe...

The round box is the phone internal junction box ( like this Bell example http://upload.wikimedia.org/wikipedia/commons/thumb/... ). This is linked to an external phone junction box through a hole in the wall behind the round box, which is also used by the doorbell wire which appears to go under the round box after originating from the white 3 line junction box by the sunken round pink painted 'cover'.

If so, the 'mains' voltage flows right under the phone's internal junction box and possibly alongside the phone cable from that to the external phone junction box when the bell is rung, by an unsuspecting potential mains voltage induced death candidate.

The RF emmited by the doorbell's coil will be across all frequencies and the higher 'densisty' of data on the download link will be more affected by this.

Other devices will also be affected by the doorbell's coil action and given the state of this section of the OP's home wiring it is no surprise that other effects are manifested in the house.