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llee040
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75 Messages

Wed, Jun 28, 2017 6:23 PM

Where can I find a diagram showing components of fiber network?

I requested fiber service when I discovered it was available. I asked about it after an AT&T U-verse Field Ops tech knocked on my door a few days ago to ask for access to our yard to help install for someone else in the neighborhood (I thought our account settings limited information AT&T can share with others, but apparently it limits what AT&T can share with us instead). It seemed logical to me that the infrastructure was already functional, especially due to the fact that I found out about it the way I did.  However, our installation tech had to bring in an engineer because of deficient optical signal before performing any installation steps at all, and the engineer had to call in a dig crew (which hasn't started work yet), so I'm assuming they pretty much have to start from scratch on the infrastructure from the last stage (GPON?) at least. I'm referring to the rectangular surface mount plate on the ground in our neighbors' yard as the GPON. Is that correct, or is that the node? Is there a diagram available online that I can refer to for an explanation of the various components? Our installation tech mentioned installing a electrical appliance box called ONC (if I remember correctly) inside the home from which copper will be fed back outside to run to the gateway drop. Apparently being the guinea pig for our nearest shared optical distribution point, I'd like to learn a little more about the system. Thanks.

llee040

Mentor

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75 Messages

5 y ago

I found a couple of online diagrams. My guess is that this one explains mostly what the AT&T configuration should eventually be like. I guess the install tech may have said "ONT" rather than "ONC" and I guess digging will have to be done to trace the connection route to the splitter, perhaps AKA the "node".

 

fiber_to_the_GPON- ONT.jpeg

 

robUV

Employee

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46 Messages

5 y ago

Hello,
 
I am a Fiber and DTV Field Manager down in the Houston area. I can clarify a bit for you. It does vary based on your location, but the general gist is the same.
 
The signal is sent from the Central Office or CO(coming from various national network centers towards the local). From there, fiber runs to several PFPs (the main box feeding the neighborhood). The chart above does not include all the individual interface points we use. The OLTs are located in the CO. 
 
The PFP is where several splitters are located. Each splitter runs up to 32 customers. The distribution side of the PFP is composed of individual fiber strands running to what we call terminals. Depending on your area, they are either buried, a pedestal in the ground, or placed on a telephone pole. We typically feed about 4 people on average from each terminal.
 
That fiber connection from there goes directly to the ONT via what we call a drop. Again, either buried or run aerial, we convert to a fiber IW if the ONT is inside, or splice to the ONT on the outside of the house. We have switched to installing inside ONTs, some people still have outside ONTs existing, but we do not install them new anymore.
 
I hope this sheds some light on your question.

New Member

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1 Message

hi I have a question with these hard times I can’t afford for a technician to come and rewire the fiber optic box in home any help on how to wire the circuits my Cat hit it off the wall

llee040

Mentor

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75 Messages

5 y ago

Thanks. Our install tech (UFO?) told us that an individual request will be automatically generated after our installation for the optical conduit he will run from the shared splitter to our inside ONT, which he will also install, to be buried in our yard. However, a Premium Care representative for our account (we've had some continuing issues) told us our area was designated green for Fiber to the GPON. Does the splitter from which he will run our individual optical connection correspond to the GPON, or does the ONT correspond to the GPON, or does something else correspond to the GPON?
markwmsn

Mentor

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76 Messages

5 y ago

As I understand it, GPON (Gigabit Passive Optical Networking) is the name of a distribution technology or system, not a location or a piece of equipment.

llee040

Mentor

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75 Messages

5 y ago

Thanks. Considering the configuration information that has already been provided, what schematic details might my Premiere Care rep have been referring by telling me that the fiber service in my area was "available to the node" and "available to the GPON"?

Mrpc9886

Teacher

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15 Messages

5 y ago

I'll tag on here because the information is interesting and we're having a problem with intermittent "Gateway Unreachable" errors.  We received a 'new' Pace 5268 router because the old one did not have an indication of service, but it did under 'old' Uverse.

The new router was installed yesterday, booted up and was working fine until just a few minutes ago when the Service light turned red and Chrome reported "Gateway Unreachable", so evidently the problem is on the AT&T side...but where?  And why doesn't my next door neighbor, also on fiber, have the same problem?  He's on 100Mb and I'm on the 1000 (960Mbps).

 

Puzzled.

Tutor

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11 Messages

5 y ago

Rob,

 

This is really helpful. We have a node right behind our buildings, about 20 feet away, but according to the tech, it can only feed 4 customers, so it needs an upgrade to feed more than 4. The problem is that these are new multi-unit buildings, there is only one address in the system that can get Fiber, that's based on the old address format which had Floor1, Floor 2, etc.., versus units like 1E or 1W. The question to you is how can we get ATT to come out and install an Inside Terminal so everyone get fiber. The entire zip code has Gigapower, but those new units do not. 

 

Also, do you have a contact for your counterpart in the Chicago area? It has been impossible to get someone to look at this, despite a million calls and requests.

 

Thank you. 

ppmguire

Mentor

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26 Messages

4 y ago

I hate to raise a thread from the dead, but was curious on the PFP setup for new neighborhoods if you're still around to answer. I'm curious if AT&T is still using GPON for these mass Gigapower installs, or if they've started utilizing XG-PON so the shared bandwidth doesn't get stretched too thin with massive demands like 4k (and unlimited caps for gige customers). XG-PON can coexist with GPON so I'm just wondering if AT&T is cheaping out by deploying the older systems or if they're actually utilizing newer (this decade) tech to compensate for greater demand. I'm in a brand new neighborhood so I'd be a bit piffed if all 6 phases are completed and speeds started slowing down over time. I know a nice spot to move to in Colorado if that's the case where several fiber companies are rolling out gigabit for cheaper than what I'm paying for GIgapower.

ppmguire

Mentor

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26 Messages

4 y ago

Yea that's easy enough to go look at, I was asking about beyond the house. If the cluster is in groups of 4 from the splitter what's connecting the cluster to the outside? Are we all still linked by gpon and gpon out of the neighborhood, or is it XG out? Let's say there's one "me" in each cluster of the neighborhood, I could see that being a problem in the near future and people becoming bandwidth starved. I know the guy at the end of the street uses his 1Gb as much as I do and if the above is true it'd explain why I sometimes get dips in performance at random times. He's only 2 houses away and I believe the PFP is in my front yard so we should be on the same cluster.  

New Member

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7 Messages

2 y ago

Is ATT Fiber Internet provided as an FTTP/FTTH service where the optical fiber extends till home and then ONT converts it on-premises

I am trying to find what is inside an ATT manhole (Fiberglass / Polymer Concrete enclosure)  in front of a home site that says - newbasis - T15/ 20K - Use 100006201 cover hook only.This is brand new location where homes are being built-in zip code - 95630 and I see only AT&T Fiber Internet 1000 provided at this location. Is AT&T Internet 1000 a FTTP/FTTH service?

Is there a Splitter equipment inside the enclosure that Splits the Optical Signal from PFP?

 

I am trying to make sure there is no Conversion of Optical traffic to Copper traffic happens in that manhole which possibly has dirty EMF radiation or any EMF radiation hazard in future. There is also a street lamp post installed in front.

New Member

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7 Messages

2 y ago

Thank you very much for the explanation @my thoughts - https://forums.att.com/users/5defad9cf6e8ee15674cec97

 

Just to be clear. Is the ground enclosure photo i posted above (AT&T newbasis - T15/ 20K) is a fiber splice terminal (FST) right? and not a PFP.

So essentially there is no conversion that happens till it reaches the ONT device. Am i getting this right?

 

 

browndk26

ACE - Professor

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4.6K Messages

2 y ago

Fiber to copper conversion occurs inside the home at the ONT. 

dave006

Scholar

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3K Messages

2 y ago

Might be a FST but it is really just a ground enclosure without looking inside. It might contain a Corning Brand Optical tap (see picture above for @my thoughts) with 4 weather proof drop connections to service nearby houses.

 

In our area the Optical tap is found in a small green box (ped) buried in the ground between every 2 houses. The gray boxes are larger and are normally found at the corners of the main road and neighboring streets.

 

It could also be a junction point where Fiber service cables from a PFP split to serve different streets. At this point it would also still be passive Fiber.

 

A PFP (Primary Flexibility Point) is typically an above ground cabinet with 2 doors where the primary fiber bundles come from the CO (Central Office). The PFP could be ground mounted or even on a pole in areas with aerial service.

 

Yes you are also correct that there is no conversion until the fiber is terminated in the ONT. That is where light signals are converted. The ONT could be on the side of your house or inside.

 

Dave

New Member

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7 Messages

2 y ago

Thank you, @my thoughts , @browndk26 and @dave006.

 

@dave006,

It looks more of Fiber service cables from a PFP split. But it could be the Corning Brand Optical tap as the enclosure size is not big enough.

 

I don't find this enclosure in front of every other home site. Rather every 6 or 8  homes. Sometimes there is a street light pole in front. Not sure of the Significance or just coincidence.

 

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