New upload speeds and Network Management - Page 102

ccarmock · 10-02-2012, 16:59

Same here in New Malden - which though fed from Croydon new Malden has a ready date of March for the upload uplift.

On ATDMA and 20480 Kb/s raw bitrate now, but no config file changes have come through yet.

What I still note is that there is still upstream congestion. I assume that since we're on ATDMA and 20480 that the overall bandwidth upstream that is available is now 20480 not the previous 10240. However speedtest still maxes out at around 1.5 to 2 Mb/s not closer to the 3.49 Mb/s my config file has (I am on the 50 Mb/s business service which explains the weird interim upstream.

I also never acheive more than 47 to 48 Mb/s downstream, yet the config file for downstream is set to 54.6 Mb/s I'd have expected a little more. This is via a hardwired connection.

Could this be a CMTS config issue? Could this explain why upstream doesn't achieve over 3 Mb/s?

Power levels are spot on :-

Locked QAM256 222 55616000 Kbits/sec 299000000 Hz 1.5 dBmV 40.8 dB Hybrid
Locked QAM256 221 55616000 Kbits/sec 291000000 Hz 1.5 dBmV 40.4 dB Hybrid
Locked QAM256 223 55616000 Kbits/sec 307000000 Hz 1.5 dBmV 40.5 dB Hybrid
Locked QAM256 224 55616000 Kbits/sec 315000000 Hz 0.6 dBmV 39.5 dB Hybrid
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown

Upstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power
Locked ATDMA 2 20480 Kbits/sec 35800000 Hz 39.5 dBmV
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

Primary Downstream Service Flow
Downstream(0)
SFID 21328
Max Traffic Rate 54600000 bps
Max Traffic Burst 10000 bytes
Mix Traffic Rate 0 bps

Primary Upstream Service Flow
Upstream(0)
SFID 21327
Max Traffic Rate 3490000 bps
Max Traffic Burst 8160 bytes
Mix Traffic Rate 0 bps
Max Concatenated Burst 8160 bytes
Scheduling Type Best Effort

Tuvoc · 10-02-2012, 17:32

Quote:

Originally Posted by pearl

Seems at least some of the upgrade work has been done here in croydon. Now on ATDMA with max raw bitrate of 20480. Hopefully it will be done by april when the schedule says it will even though it is already so much later than the majority of the country.

Ooooh now that sounds promising !

pearl · 10-02-2012, 17:43

correct me if I'm wrong but isn't 54600000bps equal to 52.07Mbps?

Equally 3490000bps = 3.32Mbps

craigj2k12 · 10-02-2012, 18:20

Quote:

Originally Posted by pearl

correct me if I'm wrong but isn't 54600000bps equal to 52.07Mbps?

Equally 3490000bps = 3.32Mbps

well 54600000bps is equal to 54.6mbit

and 3490000bps is 3.49mbit

I think your subtracting overheads

qasdfdsaq · 10-02-2012, 18:32

He means mibibit, he just doesn't know it.

roughbeast · 10-02-2012, 22:30

Quote:

Originally Posted by qasdfdsaq

He means mibibit, he just doesn't know it.

Surely he meant mibibyte.

qasdfdsaq · 11-02-2012, 03:00

No, bit. Not byte.

VM's top tariff isn't even close to 3 mibibyte. That would be 28 megabits per second. More than the entire channel's total upload capacity.

roughbeast · 11-02-2012, 09:05

Quote:

Originally Posted by qasdfdsaq

No, bit. Not byte.

VM's top tariff isn't even close to 3 mibibyte. That would be 28 megabits per second. More than the entire channel's total upload capacity.

Now you are getting all serious and correct. I assumed you were jesting.

ccarmock · 11-02-2012, 11:37

To bring this back to the question... does anyone think this could be a CMTS config issue? I know there have been reports in the past of a mis configuration that has caused small speed reductions. I am not at all unhappy with the service, just puzzled as to why it maxes out at 47/48 Mb/s and not just over given the profile. I have seen plenty of people post reports of just over 50 Mb/s

qasdfdsaq · 11-02-2012, 16:30

Possibly. Don't forget VM throttle your speed at both ends - your modem limits the speed dependant on it's config file, but the CMTS does the same thing based on it's configuration, so that people with "hacked modems" don't get more than thier provisioned speeds. Quite what the CMTS config says I don't know.

pearl · 12-02-2012, 00:38

Quote:

Originally Posted by qasdfdsaq

He means mibibit, he just doesn't know it.

google says that 1kilobit is equal to 1024bits. I thought when people talk about bits and bytes they usually don't bother with the binary prefixes even though it was accepted that that was how it worked.
sorry for the tangent.

dajone · 15-02-2012, 06:30

Can anyone tell me if there has been a delay in the upgrade for upload speed for the uddingston area as date given was feb12 i have rebooted my modem every day since the 12th and still only get 1.75.upload speed

**Hugh** · 15-02-2012, 06:43

Feb 12 referred to the month and year, not month and day...

dajone · 15-02-2012, 06:57

Thx Hugh guess i will wait till 1st march....whats another couple of weeks when been waiting for ages already

Must have needed alot of work done as nearly everyone has been upgrade

Andrewcrawford23 · 15-02-2012, 10:09

ther eno garantee it will be ther eon 1st march it is estimate date