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542 posts

Ultimate Geek

#120794 14-Jun-2013 01:27
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I was just wondering about this short segment of fibre that's near us. It would appear to go from our rural exchange to the Telecom cellphone tower (if you walk the road there's a few no-dig, here lies fibre placards) . I've heard that our area's backhaul goes out out via the tower, would this be likely? We've been suffering peak time congestion lately (didn't really have an issue with this since switching to Telecom a few years ago) and I was wondering where it's getting choked up. I'm assuming we're on a Conklin as when the connections is running fine, downloads are a touch over 3Mbps but sync is 832000/7616000. When congested, the traffic is very sawtoothed and lucky to peak over 1Mbps down.

So, do you think they would be; utilising the fibre at all as backhaul to the tower and then going out to the wider world from there, using the fibre in the reverse direction and copper heads off somewhere else, the fibre's dark, or...?

Our local school is scheduled for a microwave link which would seem to leave everyone else in the lurch in regards to expanding the bandwidth pool in the foreseeable future so I'm going to see about line of sight to a wireless provider but it would be good to know if that little bit of fibre could be being utilised better...

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  #836648 14-Jun-2013 07:37
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A cellsite isn't going to be used as backhaul to the greater world, if there is fibre running to the cellsite from the exchange it would just be backhaul to the cellsite. Since fibre is just a point to point connection, there isn't any way you could utilise this.

If you're on a Coklin or ASAM have you looked to see whether you're getting upgraded as part of the RBI? Most of this kit does ultimately go and those areas where it isn't being replaced will typically have a wireliness RBI solution available to them.


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  #836941 14-Jun-2013 17:10
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Thanks for the reply. Nothing's going to be upgraded with the fixed line as far as I know (see chorus map below), seems that a few areas around us will.

We're meant to be covered by Vodafone in the final RBI coverage but not in the next 12 months, not sure whether to get locked into a wireless contract (depending on line of sight) or not till then.

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  #836974 14-Jun-2013 18:53
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If the fibre is in a duct or has spare fibres could these not be used? Obviously you would have to pay for the install? I've also heard of smaller "exchanges" (cabinets) which use microwave for backhaul e.g. in the real whoops

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  #836986 14-Jun-2013 19:01
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If Chorus are doing a DMR link to the school then you must be classed as 'really really remote' haha. It is pretty impressive how far they have gone to get fibre to some schools.
Is there not a WISP in the area that could deliver internet?

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  #837445 15-Jun-2013 23:26
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I am guessing its probably not a conklin - 3mbps sounds a little fast from what i have expierenced. I know they can have multiple 2mbit ATM links behind them but usually there is only a single 2mbit link feeding it.

I am going to suggest that it is a microwave backhaul link, with an ADSL 1 dslam in the exchange/cabinet.

The fibre can be used to backhaul a cellphone tower to the exchange, which then uses a microwave radio link (DMR) to connect to the rest of the chorus/telecom network.
This is the situation at Waimarama beach
Telecom have a microwave DMR link between the waimarama exchange (ADSL enabled) which gets fed from napier/hastings. Then a fibre link runs between the exchnage - a few kms up a hill to a vodafone cell tower.
Telecom simply provide vodafone a WAN service for feeding their cellular towers and telecom just choose to backhaul it using the microwave DMR link into its greater network.

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  #837447 15-Jun-2013 23:34
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If you're on Telecom I can check this out for you - just private message me your landline number. There's no plans for this area for RBI Broadband and the fibre is indeed just to an exchange which has a microwave link, this limits the total available amount of bandwidth for xDSL connections also. This area is generally 1mbit coverage so you're going pretty well to get 3mbit.

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