HUB 3 Streams
 

Why does HUB 3 have 20 download streams but only has 2 upload streams?
am sure when I was on HUB 1 and 2 I had more upload streams than 2 which HUB 3 has.

Re: HUB 3 Streams
 

Most people have 2 upload channels i think, eventually that will increase over time to maybe 4.

I have 24 download channels and 2 upload channels so you have nothing to worry about, your 20 down and 2 up is perfectly normal.

Re: HUB 3 Streams
 

Some areas will have 20 to 24 downstream channels . But some areas have 4 upstream channels but the hub will only use 2 that the UBR tells it .

Re: HUB 3 Streams
 

whats the reason in having so few upload streams?

Re: HUB 3 Streams
 

$$$$

The shubs can use up to 4 bonded upstream channels. Many areas are only on 2, some are on 3 and I think some are even on 4. Adding more upstream channels costs a fortune and VM are trying to squeeze more juice out the existing channels before they invest in more (which is why we have seen the move to qam64 from qam16). As with everything though, you don't need to worry about the lack of channels unless you are suffering from congestion or slow speed. I am on two QAM64s and never have a problem getting full speed.

Re: HUB 3 Streams
 

That's news to me. As far as I know my 4 upstream channels are all used. I'm not aware of any mechanism that slugs the upstream in the manner you've described.

If I'm wrong, can you provide the detail?

Re: HUB 3 Streams
 

My area has 3 upstream channels available but i only ever use 2. Atm i am using channels 2 and 3 (channel 3 is qam16) but i can guarantee that if i reboot my shub i'll lock onto channels 1 and 2 which are both qam64.

Re: HUB 3 Streams
 

How do you know you are only using channels 1 & 2? AFAIK you'd be using all 3, constrained in in terms of packet/symbol reconstitution by the 16QAM channel.

Re: HUB 3 Streams
 

Re: HUB 3 Streams
 

Exactly the same in my area - 3 upstream channels available but only two ever used. This is the Business 350 Mb/s service on the Hitron

Re: HUB 3 Streams
 

Not sure how many we have available but since they did some work in the area a few weeks ago we've been on 24 down and 3 up.

Re: HUB 3 Streams
 

OK - I see what's going on. You only have two bonded channels at any one time. Your area hasn't been upgraded to the extent that mine has.

I have four bonded channels.

Re: HUB 3 Streams
 

My upstream channels are 44 and 46 and always show as Qam 16 what does that mean for me?

http://www.cableforum.co.uk/board/at...1&d=1509791783

Re: HUB 3 Streams
 

It means they've got to clean up the noise, prolly by renewing lasers.

Plus they need to add fibre or install frequency division in order to increase the number of available bonded channels on any node.

Re: HUB 3 Streams
 

you don't need to worry about the channel ID's, they are just numbers so you can keep track of which channels you are using instead of looking at the frequencies. It is like you using locker number 52 at work instead of 27, it makes no difference. The two things you need to look at are the upstream power (yours is 36) and the modulation (qam16). The modulation is an indication of the level of throughout achievable on your line. Years ago you would frequently see it drop to qpsk but you don't see that anymore. QAM64 is the new standard/target because it offers 50% increased throughput vs QAM16 which means you are less likely to suffer congestion on your upstream speed. As an example, if each upstream channel could upload at 20mbits on QAM16, on QAM64 it can do 30mbits so two bonded channels now offer 60mbits instead of 40. The actual numbers are a bit higher than that but VM are going down that route atm before they start making more channels available and increasing the sizes of the bonding group. Igni has said in another thread very recently that they just aren't interested at all atm.