You seem to be criticising "The feed may well follow the same route (not routing) except physically bypass the original PCP". Possibly that is badly worded. I was trying to convey that the bypass could be external or internal to that PCP, but if internal it would still be a physical connection bypassing everything else inside it.

In other words some form of large-scale jumpering straight through, making the PCP and the AIO completely independent. To my mind, being fed from the PCP implies some function is performed on those lines by the PCP before the signal continues to the AOI. That the AOI is still dependent in some way on it. (Other than as protection against the environment). "Fed from" != "Fed through".

In effect I said I don't know how the E-side PSTN connections are done to the new AIO. The OP may be right about the physical links. I said so in the post I link to later in this one.

What I am saying, and I believe correctly, is that is completely irrelevant to the dispute over the new AIO being designated as a PCP, with a "direct" connection to the MDF, not as a secondary to the original PCP. It becomes logically independent of that PCP, however the wires get routed .

I suggest you exaggerate my fault. Compare any minor inaccuracy in my description with this nonsense:-

In reply to a post by 8skellerns:

My infill cabinet does not have 1 single vdsl signal running through the 100 E side cable supplying it from the other fttc cab 2.5 miles away

I'll bet my best twisting cutters them pairs are still in the original cab.

If you are dropping an all in one cab on 3 dside cables that could be fed by 3 different mainside cables, you'll need 9 airblocked straps in the cab hole. That's assuming you can work on the mainside joints as a lot are too tied in with all the fibre tubes on top of them nowadays.

I've had to divert pairs off of the new all in one cabs and put them back on the original (don't ask why! ) and did have to fit a strap, but in the AIO cab hole! The pairs were in the original cab just like they always were.

Does that in any way mean that the AIO is not separately identified on the MDF? That was the original dispute.

So if tapping through for spares in the original cab I might inadvertently be taking a spare E from one of the Frankenstein cabs further on ?

In the example I was on about these weren�t AIO cabs, these were fibre twins added to the original SCP�s, and these SCP�s bastardised to become PCP�s.

Seen both SCP�s be turned into PCP�s (fed from existing PCP�s) and shown as a MDF>PCP1>PCP2>DP (where PCP was the old SCP). Also seen where an AIO was dropped after a PCP so MDF>PCP1>PCP2 (new AIO) > DP. Obviously the required live to live migration takes place after it is installed and commissioned to stop any cross talk from multiple DSLAM�s that have live circuits being moved into the new PCP2.

Your correct taking any spare E side in say PCP1 maybe a spare for PCP2 as well but as you know when they�re no useable spares PTO is called to tap out some clean pairs. The E sides between PCP1 and PCP2 are also classed as E sides but will be PET cable.

A man who is on my wavelength! Never known a D side from a PCP be ripped out when fitting a AIO further down the D side, and replaced with a pressurised E side cable bypassing the other PCP. Would mean running new cable all the way from to the MDF to the AIO and BT wont invest that money even back in the days when BT invested in copper!

Sometimes they have to if the new AIO is fed by two gaining cabinets that�s policy to remove pairs from the first cabinet and joint straight through st the base of the PCP. Most of the time it�s only fed by one cabinet so no problem to put an AIO further in the network.