60M How Many Customers Per Upstream?

blue166 · 22-01-2013, 19:53

Hi guys,

I am just wondering how many customers are roughly assigned to 1 upstream channel. (I am not bonded).

And are these channels located at the node uBR?

Thanks,

Chrysalis · 22-01-2013, 20:02

I believe this varies hugely from area to area.

So the question might be more better to say what is the limit VM push upstreams to.

I can tell you my port did hit the technical limit once before, to the point my modem was kicked off due to lack of space to connect.

Eeeps · 22-01-2013, 20:40

Rather than the number of customer it should be the bandwidth contention ratio.

If Virgin use 50/1 then a 20Mb upstream channel can support a total sum of 1Gb/s for all users.

That would give 100 100Mb/s(10Mb/s U/S) users or 1000 10Mb/s(1Mb/s U/S) users.

Given a mix then somewhere between the two.

RB2004 · 22-01-2013, 23:10

Around here basildon ubr I have only seem an upstream channel 1.

General Maximus · 23-01-2013, 10:54

it is a good point and although the numbers can look very bad I can honestly say I have never ever had an issue maxing out my upstream connectin regardless of what tier I was/am on, so the juice must be there to use.

Sephiroth · 23-01-2013, 12:50

Prior to the current upgrade program it varied between 50 and 250 users per upstream channel. The upgrade programme is supposed to equalise this so that oversubscribed areas have correspondingly more upstreams to share.

I'm not privy to the new ratio.

Eeeps' point about contention ratio is valid except that it doesn't allow the OP to understand the true contention for the upstream in his area.

RB2004 · 23-01-2013, 15:45

If its only 50 to 250 why is it I'm on channel 1 and haven't seen another channel number?

Sephiroth · 23-01-2013, 16:02

The 250 figure was given out here by Igni some months ago referring to the then abysmal Mortlake area and the Croydon region. Other areas may be as bad.

This would be a line card port channe lrepresenting an optical node. And after upgrade, more channels(i.e. frequencies) on that port. I think that's how it works.

blue166 · 25-01-2013, 00:45

Guys,

Back in November during high utilization problem 1, Virgin Media told me that they done load balancing on my segment. I had a new upstream channel (ID 51) available to me. A little after a week later I could never connect to US 51 again and have not seen it since.

There is still high upstream utilization on my cable. My question is why was it not left? I just can't figure out why it was removed or disabled. either way I have not seen it since.

Any idea's ..?

Also could they not have US bonded channels early or even done it as a temp measure until the Cat C Reseg work?

Thanks,