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Author Topic: An Adventure With an Adva Fibre Service Platform  (Read 721 times)

burakkucat

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An Adventure With an Adva Fibre Service Platform
« on: September 23, 2020, 01:27:38 AM »

Subtitled: Or How a Service Providing Internet Access Used ADSL2, Optical Fibre and VDSL2 Links in Series.

As a diagram will definitely assist with the understanding, please equip yourself with an A4 sheet of paper and a pencil.

Orientate the paper in landscape mode and draw seven rectangles, equally spaced, in a line across the top of the paper. Within each individual rectangle insert one upper-case letter, from A to G, sequentially.

From the left-hand edge of the paper, draw a line to meet the mid-point of the left-hand side of rectangle A. Then draw lines linking the first six rectangles together. Do not draw a line linking rectangles F and G.

Now number the horizontal lines that are linking the rectangles. Between A & B, number it 1 . . . between E & F, number it 5. Finally, in the gap between F & G (there is no horizontal line), number it 6.

On the lower part of the A4 sheet of paper add the legend to the diagram:

(A) NTE5/A and SSFP

(B) Huawei SmartAX MT882

(C) Planet GT-802S

(D) Adva FSP150CC-GE112 (See the FSP 150-GE100 Series web-page and datasheet. Also Adva's YouTube channel video, linked below.)

(E) Planet VC-231

(F) ZyXEL VMG1312-B10A

(G) Dell Latitude E5500 and kuro neko.



(1) Twisted pair cable, 8P2C plug (pins 4 & 5) and 6P2C plug (pins 3 & 4). ADSL2 (ITU-T G.992.3). ATM cells. PPP session.

(2) Ethernet patch cable. PPP session.

(3) Pair of single mode optical fibre cables (as a duplex link). SC/UPC and LC/UPC connectors. PPP session.

(4) Ethernet patch cable. PPP session.

(5) Twisted pair cable, 6P2C plugs (pins 3 & 4) at each end. VDSL2 (ITU-T G.993.2), profile 17a, PTM. PPP session.

(6) IEEE 802.11n wireless link.



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Alex Atkin UK

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Re: An Adventure With an Adva Fibre Service Platform
« Reply #1 on: September 23, 2020, 05:20:51 AM »

I'm very confused.
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licquorice

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Re: An Adventure With an Adva Fibre Service Platform
« Reply #2 on: September 23, 2020, 11:19:26 AM »

Interesting experiment
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burakkucat

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Re: An Adventure With an Adva Fibre Service Platform
« Reply #3 on: November 14, 2020, 12:11:34 AM »

I'm very confused.

And b*cat thought he had carefully detailed everything.  :(

Let's try considering the major components of the infrastructure making up the circuit that carries your Zen provided service. Would you agree with the following list --
  • Zen owned equipment in the head-end exchange.
  • Cable link(s) between the Zen equipment and the BT equipment.
  • An ECI OLT.
  • Optical fibres(s) from the OLT exit the building, pass through track nodes, etc, then aggregation nodes, before reaching the various fibre cabinets.
  • An ECI Hi-FOCuS Mini-Shelf M41 MSAN (used just as a DSLAM).
  • Pairs from each line-card port of the M41 pass via wiring harnesses to the Krone strips, then tie-cables to the PCP, D-side cables to DPs, either an aerial drop or an underground feed, NTE5 plus SSFP and, finally, a patch cable to the CPE.
  • Your HH5A, running OpenWRT, is the CPE
Now I shall construct another list, with seven bullet points, thus --
  • The Huawei SmartAX MT882 [at (B)].
  • The Ethernet patch cable [at (2)].
  • The Planet GT-802S [at (C)].
  • The pair of single mode optical fibre cables (as a duplex link) [at (3)].
  • The Adva FSP150CC-GE112 [at (D)], the Ethernet patch cable [at (4)] and the Planet VC-231 [at (E)] all considered as one entity.
  • The twisted pair cable [at (5)].
  • The ZyXEL VMG1312-B10A [at (F)].
If you consider the first ... seventh bullet point, of the first list, with first ... seventh bullet point, of the second list, can you now see the experimental simulation that I built in The Cattery and described in the opening post of this topic?  :)
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Alex Atkin UK

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Re: An Adventure With an Adva Fibre Service Platform
« Reply #4 on: November 14, 2020, 04:55:20 AM »

Ah, so you are replicating the entire VDSL circuit as close as possible to how its really structured?

I think what threw me was the idea someone is crazy enough to do this and why they would. ;)

Although I have to admit I have considered getting an ethernet to VDSL adapter, just to see how different modems perform when syncing under ideal conditions.
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burakkucat

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Re: An Adventure With an Adva Fibre Service Platform
« Reply #5 on: November 14, 2020, 03:55:49 PM »

Ah, so you are replicating the entire VDSL circuit as close as possible to how its really structured?

Yes, that is the case. But it wasn't my original intention.

I had initially planned taking the PPP session, originating in TalkTalk-land (carried to me on an ATM based, ADSL2 circuit), and repackaging it to be carried on a PTM based, VDSL2 circuit as a "fun project" for our friend Weaver to remotely consider and analyse. Whilst laying out all the hardware (before connecting it together), I had the sudden thought: "Can I also include an optical fibre link somewhere in the setup?" The answer was, obviously, a "Yes" and then it occurred to me that I could simulate an entire VDSL2/FTTC circuit from ISP/CP hardware, located in a BT Group building, to the CPE in the end-user's premises.

There were three people who had an inkling that I was "up to something" . . . The indicative paw points towards Weaver, licquorice and CarlT.
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Weaver

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Re: An Adventure With an Adva Fibre Service Platform
« Reply #6 on: November 14, 2020, 10:15:20 PM »

I am ashamed to say that I am too befuddled to look up all the functions of the different models, so a recap / summary would be helpful (am not well at the moment), and this despite the fact that Burakkucat kindly sent me lots of reading material+manuals.
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