Kitz Forum
Broadband Related => Broadband Technology => Topic started by: Privatepyle on October 19, 2020, 03:12:49 PM
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Hi all, I have been reading the site and learned so much about FTTC from it.
Now that FTTP is becoming more popular I am trying to learn more about how it is provisioned from the exchange to the home and what equipment is inbetween.
From what I have read online it seems to point the fibre line is all the way from the exchange to the home, so does that mean it bypasses the PCP and green fibre cabs and goes directly to the home via a telegraph pole with a CBT or underground?
Also if it does bypass the cab then does FTTP still have cards and ports and if so are they back in the exchange?
Also does FTTP have DLM?
Thanks in advance, I am trying to learn more so sorry if the questions are a little basic 😂
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No DLM.
FTTP leaves the exchange to an Aggregation Node.
These nodes also feed the FTTC cabinets with fibre.
The fibre for FTTP does indeed bypass cabinets.
There are still cards and ports but they are on the OLT in the exchange.
Possibly the same OLT that feeds the local fibre cabinet.
CBT's can be both underground or on telegraph poles.
OpenReach uses GPON FTTP which is passive so there's no powered equipment between the exchange and the home.
In some rural areas they can extend the reach of FTTP by installing a subtended head-end next to an existing FTTC cabinet.
This approach uses spare fibres (and power) from the FTTC cabinet to deploy FTTP to local homes. At the moment it isn't a very common deployment method but that may change over time.
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In some rural areas they can extend the reach of FTTP by installing a subtended head-end next to an existing FTTC cabinet.
This approach uses spare fibres (and power) from the FTTC cabinet to deploy FTTP to local homes. At the moment it isn't a very common deployment method but that may change over time.
Why don't they always do this, it would surely save time and money?
We are more than 3KM from the exchange but only 800m or so from the cabinet.
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In generic terms, yes, FTTP begins its journey from the 'Head End' in the parent Exchange (this may not be the same Exchange your phone line is provisioned from, it may well 'bounce' off another Exchange known as a 'Parent & Child' set up).
From there the remit is to follow the same ducts/poles as the copper cable does, but there are scenario's where this can and does change such as 'civils avoidance, high cost, traffic management etc'.
Depending on the existing network capacity and the cost of deploying a new fibre spine cable, sometimes we use a SHE (Subtended Head End) design that utilises the spare cables going into the existing FTTC Cabinet.
I'm not sure about DLM on FTTP, but can't for the life in me see why it would be required ??.
Sorry for quick answers ... busy as.
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No DLM.
FTTP leaves the exchange to an Aggregation Node.
These nodes also feed the FTTC cabinets with fibre.
The fibre for FTTP does indeed bypass cabinets.
There are still cards and ports but they are on the OLT in the exchange.
Possibly the same OLT that feeds the local fibre cabinet.
CBT's can be both underground or on telegraph poles.
OpenReach uses GPON FTTP which is passive so there's no powered equipment between the exchange and the home.
In some rural areas they can extend the reach of FTTP by installing a subtended head-end next to an existing FTTC cabinet.
This approach uses spare fibres (and power) from the FTTC cabinet to deploy FTTP to local homes. At the moment it isn't a very common deployment method but that may change over time.
Brilliant, that is so helpful, I really appreciate you responding to me 👍🏻
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In generic terms, yes, FTTP begins its journey from the 'Head End' in the parent Exchange (this may not be the same Exchange your phone line is provisioned from, it may well 'bounce' off another Exchange known as a 'Parent & Child' set up).
From there the remit is to follow the same ducts/poles as the copper cable does, but there are scenario's where this can and does change such as 'civils avoidance, high cost, traffic management etc'.
Depending on the existing network capacity and the cost of deploying a new fibre spine cable, sometimes we use a SHE (Subtended Head End) design that utilises the spare cables going into the existing FTTC Cabinet.
I'm not sure about DLM on FTTP, but can't for the life in me see why it would be required ??.
Sorry for quick answers ... busy as.
Thank you for the reply, really helpful.
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Indeed, thanks to the site oracles for this information which I certainly did not know and to the new'ish forum member who inquired.
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I'm not sure about DLM on FTTP, but can't for the life in me see why it would be required ??.
It isn't. ;)
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Why don't they always do this, it would surely save time and money?
We are more than 3KM from the exchange but only 800m or so from the cabinet.
They put Aggregation Nodes in place during the FTTC rollout with a future FTTP rollout in mind.
Your FTTP will come from the Aggregation Node that's already there serving your FTTC cabinet.
It could even be in a chamber in front of your FTTC cabinet.
Subtended Head-Ends could actually add time and/or cost for the majority of normal FTTP rollouts.
The fibre for your FTTP is already as far as your local Aggregation Node.
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It isn't. ;)
Thanking thee, Mr Cat ;) ;D
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With GPON fibre is it just a case of feeding the residential end direct into my router or would I need another powered device before the router?
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For the Openreach FTTP GPON deployment, the interface, to which the end-user's equipment will connect, is a gigabit capable Ethernet port.
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With GPON fibre is it just a case of feeding the residential end direct into my router or would I need another powered device before the router?
OpenReach provide a powered ONT (FTTP modem) with every FTTP install.
This remains with the property, in case you ever move out.