Number of channels
 

There was a recent notification of work in my area from Virgin Media Business. I asked my contact in VMB what the work actually was and was told it was to upgrade the area to a 32 downstream channels and is one of the first areas to receive that change.

I thought it odd, since current CPE only supports 24, and wondered if he was mistaken.

Prior to the upgrade the Hitron device I have shows the full 24 downstream channels (and 3 up). THe Hitron has slots 1-24 and also the channels IDs were previously 1-24. However I now see that after some reboots slot 2 will list channel id 5 and the channel numbers go up to 28 currently, at a higher frequency than I have seen before, this would seem to support a channel group of larger than 24....

Port Frequency (Hz) Modulation Power (dBmV) SNR (dB) Channel
1 299000000 256QAM 2.600 36.610 21
2 171000000 256QAM 1.700 36.387 5
3 179000000 256QAM 1.800 37.356 6
4 187000000 256QAM 2.000 37.356 7
5 195000000 256QAM 2.100 37.356 8
6 203000000 256QAM 2.100 37.636 9
7 211000000 256QAM 2.100 36.610 10
8 219000000 256QAM 2.000 36.610 11
9 227000000 256QAM 1.800 36.610 12
10 235000000 256QAM 1.500 36.610 13
11 243000000 256QAM 1.300 36.610 14
12 251000000 256QAM 1.100 36.610 15
13 259000000 256QAM 1.300 36.610 16
14 267000000 256QAM 1.500 36.610 17
15 275000000 256QAM 1.900 36.387 18
16 283000000 256QAM 2.200 36.387 19
17 291000000 256QAM 2.400 36.610 20
18 307000000 256QAM 2.900 36.610 22
19 315000000 256QAM 3.100 36.610 23
20 323000000 256QAM 3.200 36.610 24
21 379000000 256QAM 2.400 36.610 25
22 387000000 256QAM 2.600 36.387 26
23 395000000 256QAM 2.600 36.387 27
24 403000000 256QAM 2.500 36.387 28

Upstream Overview
Port Frequency (Hz) BandWidth Modulation Power (dBmV) Channel
1 37599971 6400000 ATDMA 38.500 1
2 24400026 6400000 ATDMA 37.000 3
3 31000014 6400000 ATDMA 37.500 2

Re: Number of channels
 

Nope the Hitron only supports 24 downstream channels. Quite a few areas are having the 32 channel upgrade I’ve been told, but it’ll be on a need basis not a blanket basis. The channel ID is just a label, it’s irrelevant to anything to be honest, so as you’ve noticed your modem will lock on to 24 of the 32, and in theory there should be a bit of load balancing done by the CMTS to evenly distribute

Re: Number of channels
 

Spot on Tech, just because there are more than 24 downstream's doens't mean you will get access to more concurrent channels. The current Hub 3 and Hitron support 24 downstream channels, it will be DOCSIS 3.1 before we start seeing CPE that will handle more than this.

Re: Number of channels
 

Yes understood that the Hitron can only handle 24 downstream channels- it's just that in this area now it can select 24 from a pool of 32. Wondered if that was to prepare for CPE that supports 32, or just to increase capacity.

Re: Number of channels
 

Currently it will be for more capacity. I would imagine the next CPE step will be docsis 3.1, but who knows there may be a 32 channel modem launched at some point.

Re: Number of channels
 

I think the last link Igni gave regarding CPE which Liberty Global were trialling was 32 downstream and 8 up

Re: Number of channels
 

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