Dial Tone once SOGEA'd

Just out of total interest, and not an issue at all, but what determines what 'signals' are left on your line when it's converted to SOGEA ?

I was converted two weeks ago. There's still 50 volts there, and there's still dial tone, though you can't make it 'go away' by dialling (If you get my drift !)

Another friend, just has the NU Tone, (not sure about voltages)

Someone else I know has nothing, no audible tone, and no measurable volts ?

What determines what you end up with, exchange system architecture and age etc, or different polices by different staff ?

All new SOGEA provision jobs will now be D side only. So no conditions at all.

Previously the E side was still connected, this might have soft dial tone (which your line has) NU, or nothing at all.

In reply to a post by Zarjaz:

All new SOGEA provision jobs will now be D side only. So no conditions at all.

Previously the E side was still connected, this might have soft dial tone (which your line has) NU, or nothing at all.

Had to look up D side https://en.wikipedia.org/wiki/D-side_(UK_telephone_c... refers.

Is there any benefit in terms of Signal to Noise or reducing cross talk in taking the E side out?

Is there any benefit in terms of Signal to Noise or reducing cross talk in taking the E side out?

No … (well not for an FTTC circuit)

The E sides are being disconnected because they are not required, and it is a small step towards the eventual recovery of E side copper.

You can try dialing 17070 and see if it gives you a phone number for your line.

The test kit in the exchange determined what lines were left with dial tone and voltage.

SIN 517 section 1.4 goes in to a bit detail on different configurations of the E-side with SOGEA lines and what lines retain a dial tone and voltage due to the line test equipment available at the exchange.

SIN 517- Single Order Generic Ethernet Access (SOGEA) over VDSL2 and Gfast Service & Interface Description V4_0 December 2023

My understanding was that all new SOGEA installs were now D-Side only (aka "Day 2" SOGEA) but there might be specific exchanges where this isn't the case.

Basically the copper between exchange and cabinet isn't needed on SOGEA but it was left connected solely for the purpose of providers being able to do some specific remote line tests. Openreach have since done whatever was necessary so that all these tests can be carried out straight from the DSLAM, fully negating the need for the E-Side.

In the past there were issues with certain types of tests on the ECI FTTC cabinets. I'm guessing they worked round those issues.

You will probably find the voltage and/or dial tone disappears.

One of the changes allowing for this D side recovery to be done is now the use of a ‘FED’ (far end device) The engineer attaches this on the line, where required, this provides a tone to be worked to, allows pair quality tests to be run, can be remotely switched over to allow sync tests to be made, bunched pair to earth for bridge tests, etc, etc.

https://www.tempocom.com/openreach/products/

In reply to a post by candlerb:

You can try dialing 17070 and see if it gives you a phone number for your line.

But I can't, can I !?

In reply to a post by broadbandjockey:

In reply to a post by candlerb:

You can try dialing 17070 and see if it gives you a phone number for your line.

But I can't, can I !?

More importantly, why would you need to ? It will most likely tell you the directory number that was previously on the line until it was stopped. Useless info.

In reply to a post by Zarjaz:

In reply to a post by broadbandjockey:

In reply to a post by candlerb:

You can try dialing 17070 and see if it gives you a phone number for your line.

But I can't, can I !?

More importantly, why would you need to ? It will most likely tell you the directory number that was previously on the line until it was stopped. Useless info.

Yes, quite, though I have noticed (not to do with SOGEA, this pre dates it) but on a line where there was no service, there was still dial tone, and it allowed you to dial 17070, and possibly 999 etc, but you certainly couldn't make any chargeable calls, and dialling the number reported by 17070 just got the NU tone, or 'Sorry, there is a fault'.

When we moved house, on the morning of the move our line switched to that status. The number 17070 reported wasn't our number, it was another number. Possibly the new owners one ?...