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Anonymous
(Unregistered)Thu 18-Oct-12 09:59:02
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FTTP slaved from FTTC cab not FTTP OD


[link to this post]
 
All,

I'm just wondering if someone can confirm if the following is true or not.

Does BT's standard fit approach for FTTP include the slaving of GPONS using the CWDM mux within the FTTC cabinet? I understand this is how FTTP on demand is going to work but is this approach used for small deployments of brownfield FTTP too?

This would be pretty clever. It saves on fibre and tax cost of running multiple fibres from the Exchange. It also means that CWDM can't be used for optical based LLU in the future - I guess. frown

Regards,

Gareth
Standard User Ribble
(committed) Thu 18-Oct-12 10:30:10
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Re: FTTP slaved from FTTC cab not FTTP OD


[re: Anonymous] [link to this post]
 
Brownfield FTTP does not use any FTTC fibre network, . FTTP on demand will use existing spine cable already provided for FTTC , but will not use any cabinet hardware.

Edited by Ribble (Thu 18-Oct-12 10:30:39)

Standard User Ignitionnet
(knowledge is power) Thu 18-Oct-12 11:20:27
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Re: FTTP slaved from FTTC cab not FTTP OD


[re: Ribble] [link to this post]
 
In reply to a post by Ribble:
Brownfield FTTP does not use any FTTC fibre network, . FTTP on demand will use existing spine cable already provided for FTTC , but will not use any cabinet hardware.


Could you point me to the documents where this is discussed please Ribble?

The only one I found isn't entirely clear.


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Standard User Ribble
(committed) Thu 18-Oct-12 11:41:53
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Re: FTTP slaved from FTTC cab not FTTP OD


[re: Ignitionnet] [link to this post]
 
Sorry, not aware of any documents I can link to.
Anonymous
(Unregistered)Thu 18-Oct-12 11:51:35
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Re: FTTP slaved from FTTC cab not FTTP OD


[re: Ribble] [link to this post]
 
In reply to a post by Ribble:
Brownfield FTTP does not use any FTTC fibre network,


Even if there is FTTC spine network in the area? I'm talking about areas where BT *CANT* provide FTTC because the copper network is beyond the point of being usable and BT have declared it not fit for purpose (aluminium etc etc). The areas also have FULL micro-ducting into each home so digging is not required.

Regards,

Gareth
Standard User Ribble
(committed) Thu 18-Oct-12 12:47:31
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Re: FTTP slaved from FTTC cab not FTTP OD


[re: Anonymous] [link to this post]
 
They *may*use the same spine but I believe they keep FTTC/FTTP bundles seperate, but Im not an Openreach planner so cannot be 100% sure on this.
Either way. the local network architecture keeps FTTC and FTTC seperate from the aggregation point , typically close to the serving exchange. I believe this is the point from which FTTP on demand will be built .
Standard User RobertoS
(sensei) Thu 18-Oct-12 12:54:49
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Re: FTTP slaved from FTTC cab not FTTP OD


[re: Ribble] [link to this post]
 
"FTTC and FTTC"? (And it's "separate").

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Connection - Plusnet Extra Fibre (FTTC). Sync ~ 57.4/14.6Mbps @ 600m. - BQM

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Anonymous
(Unregistered)Thu 18-Oct-12 13:11:28
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Re: FTTP slaved from FTTC cab not FTTP OD


[re: Ribble] [link to this post]
 
Thanks for the reply it is very much appreciated.

I think things are moving on anyway as BT look like they are going to do some large FTTP deployments in the area after spending 2 years having a bit of a think about it.

wink

Regards,

Gareth
Standard User WWWombat
(experienced) Thu 18-Oct-12 22:04:57
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Re: FTTP slaved from FTTC cab not FTTP OD


[re: Anonymous] [link to this post]
 
In reply to a post by Anonymous:
This would be pretty clever. It saves on fibre and tax cost of running multiple fibres from the Exchange. It also means that CWDM can't be used for optical based LLU in the future - I guess. frown

I recently read that BT are over-provisioning the fibre out from exchange/head-end to each FTTC cabinet precisely for the future FTTP-on-demand stuff (and, presumably, for more complete GPON afterwards).

However, I can't for the life of me remember where I read it. Sorry...
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