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Standard User think26872
(committed) Fri 27-Jun-14 18:35:43
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Connections to these cabinets & maximum bandwidth per cab?


[link to this post]
 
Does anyone know what the maximum number of connections are possible to these cabinets?

http://beusergroup.co.uk/technotes/index.php?title=F...

http://beusergroup.co.uk/technotes/index.php?title=F...

If a cabinet supports 100 connections can the back haul to the cabinet support all the 100 connections running at the same time at 80/20?

If the maximum is not supported what is the overall up/down bandwidth of a cabinet?

Thanks

Edited by think26872 (Fri 27-Jun-14 18:36:10)

Standard User Ignitionnet
(knowledge is power) Fri 27-Jun-14 19:03:49
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Re: Connections to these cabinets & maximum bandwidth per ca


[re: think26872] [link to this post]
 
First cabinet takes 96 connection, second 288.

The cabs may or may not have enough capacity for everyone to run at 80/20 however everyone is guaranteed at least 30Mb, so for all intents and purposes the cabinet backhaul isn't a bottleneck.
Standard User Bald_Eagle1
(experienced) Sat 28-Jun-14 11:07:12
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Re: Connections to these cabinets & maximum bandwidth per ca


[re: Ignitionnet] [link to this post]
 
In reply to a post by Ignitionnet:
The cabs may or may not have enough capacity for everyone to run at 80/20 however everyone is guaranteed at least 30Mb, so for all intents and purposes the cabinet backhaul isn't a bottleneck.


That's interesting.
Could you please provide a reference for that guarantee as this is all I get by the time it reaches my home:-

Max: Upstream rate = 3847 Kbps, Downstream rate = 21276 Kbps
Bearer: 0, Upstream rate = 3850 Kbps, Downstream rate = 18729 Kbps


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Standard User Ribble
(experienced) Sat 28-Jun-14 11:17:31
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Re: Connections to these cabinets & maximum bandwidth per ca


[re: Bald_Eagle1] [link to this post]
 
http://www.sinet.bt.com/sinet/sins/pdf/498v5p1.pdf
Check the wording for correct understanding
"A downstream prioritisation rate of 15 Mbit/s or 30 Mbit/s (depening on the product variant purchased) or line rate, whichever is the lower,"
Standard User Ignitionnet
(knowledge is power) Sat 28-Jun-14 13:32:43
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Re: Connections to these cabinets & maximum bandwidth per ca


[re: Bald_Eagle1] [link to this post]
 
In reply to a post by Bald_Eagle1:
In reply to a post by Ignitionnet:
The cabs may or may not have enough capacity for everyone to run at 80/20 however everyone is guaranteed at least 30Mb, so for all intents and purposes the cabinet backhaul isn't a bottleneck.


That's interesting.
Could you please provide a reference for that guarantee as this is all I get by the time it reaches my home:-

Max: Upstream rate = 3847 Kbps, Downstream rate = 21276 Kbps
Bearer: 0, Upstream rate = 3850 Kbps, Downstream rate = 18729 Kbps


The poster specifically asked about backhaul, your VDSL sync rate is a quite different matter.
Administrator MrSaffron
(staff) Sat 28-Jun-14 13:45:53
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Re: Connections to these cabinets & maximum bandwidth per ca


[re: Bald_Eagle1] [link to this post]
 
The guarantee is on the link between the cabinet and the exchange.

There are no guarantees on the speed of the VDSL2 segment, since this is impacted by the length of copper to the cabinet and other factors like RF Noise, crosstalk and what VDSL2 modem you are using on the line, plus state of wiring in the home etc.

With ~18 Meg sync once presumes you are 1km or more from the cabinet, or if closer may be unlucky and the telephone line takes a longer route, e.g. goes away from cabinet then crosses road and heads back to the cabinet.

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User Chrysalis
(legend) Sat 28-Jun-14 18:23:43
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Re: Connections to these cabinets & maximum bandwidth per ca


[re: Bald_Eagle1] [link to this post]
 
a contention ratio that low is extremely unlikely to ever be congested. ISP's themselves contend way way higher.

Standard User Icaras
(regular) Sat 28-Jun-14 18:31:42
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Re: Connections to these cabinets & maximum bandwidth per ca


[re: Ignitionnet] [link to this post]
 
I'm pretty sure I read once that each cabinet has a 10Gbit link to the headend but I'm not sure where I read it unfortunately.
Administrator MrSaffron
(staff) Sat 28-Jun-14 18:55:49
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Re: Connections to these cabinets & maximum bandwidth per ca


[re: Icaras] [link to this post]
 
Backhaul is usually 1Gbps but can be multiples of this

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User Ignitionnet
(knowledge is power) Sat 28-Jun-14 20:06:26
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Re: Connections to these cabinets & maximum bandwidth per ca


[re: Icaras] [link to this post]
 
In reply to a post by Icaras:
I'm pretty sure I read once that each cabinet has a 10Gbit link to the headend but I'm not sure where I read it unfortunately.


Me either. It's GPON or 1000BASE-BX on the Huawei here.
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