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Standard User Pheasant
(knowledge is power) Thu 26-May-22 10:43:36
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FTTP Handover Exchanges - ECI + Huawei/Nokia/Adtran OLT


[link to this post] 		 
An somewhat intriguing question - perhaps for BT Group / Openreach folks in the know wink - a recent update on a thread here suggests that in early / original ECI-based OLT exchange areas (I think blown rather than connectorised deployment) have been later in-filled with (in this case) a Huawei based OLT at the same exchange.

Is this normal practise in the original ECI handover exchange areas?

The post in that thread mentioned two neighbouring properties one served on ECI and the neighbour served on Huawei from the Chester South exchange area.

TIA
Standard User j0hn83
(knowledge is power) Thu 26-May-22 11:14:49
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Re: FTTP Handover Exchanges - ECI + Huawei/Nokia/Adtran OLT


[re: Pheasant] [link to this post] 		 
Almost every exchange (or straight up all of them) with an ECI OLT has a Huawei or Nokia OLT. Often multiple of.

If the exchange has a Huawei cabinet anywhere in it then it has a Huawei OLT.
Seeing as almost all BDUK cabinets are Huawei and they stopped installing ECI cabinets in mid 2016 that means there's next to no exchanges with only ECI cabinets.

My exchange has 1 ECI OLT, at least 1 Huawei OLT (though I believe 2) and a shiny new Nokia OLT.
Standard User Pheasant
(knowledge is power) Thu 26-May-22 11:23:01
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Re: FTTP Handover Exchanges - ECI + Huawei/Nokia/Adtran OLT


[re: j0hn83] [link to this post] 		 
So fair to say that in the case of the OP in the Zen thread, that later FTTP in-fill would have been constructed using a completely separate PON infrastructure to the original PONs for the ECI deployment.


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Standard User j0hn83
(knowledge is power) Thu 26-May-22 11:25:46
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Re: FTTP Handover Exchanges - ECI + Huawei/Nokia/Adtran OLT


[re: Pheasant] [link to this post] 		 
In reply to a post by Pheasant:
So fair to say that in the case of the OP in the Zen thread, that later FTTP in-fill would have been constructed using a completely separate PON infrastructure to the original PONs for the ECI deployment.


That's a certainty. There's no new ECI FTTP PON's being deployed.

However if your local PON is ECI and you haven't yet ordered FTTP and capacity exists on that PON... bad news for you.
Standard User Pheasant
(knowledge is power) Thu 26-May-22 11:31:13
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Re: FTTP Handover Exchanges - ECI + Huawei/Nokia/Adtran OLT


[re: j0hn83] [link to this post] 		 
Yep. Somewhat interesting original design planning / capacity planning considerations from Openreach when if there was no FTTC available to these properties and FTTP was the only way forward, that they did not include enough local capacity for all properties when they completed the initial ECI-based rollout. Perhaps there is more to it historically in that particular case. New development / new properties that didn't exist then? Odd
Standard User Pheasant
(knowledge is power) Thu 26-May-22 11:33:33
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Re: FTTP Handover Exchanges - ECI + Huawei/Nokia/Adtran OLT


[re: j0hn83] [link to this post] 		 
In reply to a post by j0hn83:
My exchange has 1 ECI OLT, at least 1 Huawei OLT (though I believe 2) and a shiny new Nokia OLT.

If you said Adtran OLT then that would be interesting wink

[C'mon Openreach don't be shy, there must be some somewhere outside the pilot / trial exchanges]
Standard User XGS_Is_On
(learned) Thu 26-May-22 23:40:03
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Re: FTTP Handover Exchanges - ECI + Huawei/Nokia/Adtran OLT


[re: Pheasant] [link to this post] 		 
The ECI OLTs have no switching fabric so all the GPON ports on the card are backhauled by gigabit ports on the same card. Each CP needed a Cablelink to each line card.

Some interesting decisions were made for sure.
Standard User Pheasant
(knowledge is power) Thu 26-May-22 23:49:47
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Re: FTTP Handover Exchanges - ECI + Huawei/Nokia/Adtran OLT


[re: XGS_Is_On] [link to this post] 		 
Sounds like a fabulous architecture. Not. 😂
Standard User jpm
(experienced) Fri 27-May-22 00:28:35
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Re: FTTP Handover Exchanges - ECI + Huawei/Nokia/Adtran OLT


[re: Pheasant] [link to this post] 		 
Is there something special about ECI that means the only experience the average UK consumer has with their products is wholly negative? Are things like G.INP not working on their FTTC cabinets and this weird OLT line card design just a result of being early into the market, or were they just procured badly?
Standard User Pheasant
(knowledge is power) Fri 27-May-22 06:44:29
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Re: FTTP Handover Exchanges - ECI + Huawei/Nokia/Adtran OLT


[re: jpm] [link to this post] 		 
Quite. Imagine that Openreach have not been in a huge rush to upgrade from an ECI based PON

Even stepping them to XGS-PON could be sticky, doable, but not sure if those early PON designs were fitted with a WDM (like they fitted later) enabling another light source into the PON without disrupting / disconnecting existing customers. I suppose they could prep the change, and make a short one time disconnection to introduce a WDM onto the headend. Fortunate I suppose it’s only 50K or so customers on ECI based FTTP gear.
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