Connection dropping, but modem lights remain healthy. - Page 2

General Maximus · 30-05-2011, 22:15

Quote:

Originally Posted by pip08456

The 250 will handle 10Mb with no problem.

The 250 will handle 30mbit but no more than that. I used to have the Teryaon TJ210 when I was only 10mbit and i had to ring up and get the Ambit 250 for 20 mbit. It was quite funny watching it, I had a 20mbit config file but the TJ210 wouldnt budge above 10mbit. As soon as I connected the 250 it blasted away, the difference was unbelievable.

pip08456 · 30-05-2011, 22:39

Quote:

Originally Posted by General Maximus

The 250 will handle 30mbit but no more than that. I used to have the Teryaon TJ210 when I was only 10mbit and i had to ring up and get the Ambit 250 for 20 mbit. It was quite funny watching it, I had a 20mbit config file but the TJ210 wouldnt budge above 10mbit. As soon as I connected the 250 it blasted away, the difference was unbelievable.

As it is not a DOCSIS3 modem it's highly unlikely.

General Maximus · 31-05-2011, 07:47

cant it do it on docsis 2 if it wanted to? i am sure i read somewhere that it maxes out at just over 30

pip08456 · 31-05-2011, 07:54

IIRC it's not a DOCSIS2 modem either

Peter_ · 31-05-2011, 07:56

Quote:

Originally Posted by General Maximus

cant it do it on docsis 2 if it wanted to? i am sure i read somewhere that it maxes out at just over 30

They can theoretically run up to 38Mb but not on our platform.

Gar · 31-05-2011, 12:43

Small update:

I'm still experiencing the same type of connection drops on a daily basis. Still very intermittent. Everything on my end seems to check out fine, so I'm thinking maybe it's a problem in my general area? Maybe the VM street box?

Masque, is there any way that you could possibly check for known issues in my area? I believe my area code is gors1. If not, how would I find out?

Many thanks.

Peter_ · 31-05-2011, 13:13

Quote:

Originally Posted by Gar

Small update:

I'm still experiencing the same type of connection drops on a daily basis. Still very intermittent. Everything on my end seems to check out fine, so I'm thinking maybe it's a problem in my general area? Maybe the VM street box?

Masque, is there any way that you could possibly check for known issues in my area? I believe my area code is gors1. If not, how would I find out?

Many thanks.

Try te Service Status page if no joy you will need to call in.

https://my.virginmedia.com/service-s...640D.tomcatmy6

Gar · 31-05-2011, 19:30

Thanks. I checked and there are no known issues in my area.

I don't want to have to call support if I don't have to, so I'm seeking to try self-help methods first, just in case it's something I can fix on my own.

I have an old Forward Path Attenuator (10dB) which I have since attached to my modem. Worth a shot right?

Since fitting the attenuator my downstream power level has lowered and now averages about -2.2

Out of curiosity, what at the latest optimum power levels for both downstream and upstream (for a 255 modem)? And what are the highest possible ceiling limits for both downstream and upstream before connection drop-outs (like my own) would occur?

pip08456 · 31-05-2011, 19:34

They've been here for a loooooooong time if you cared to look!

http://www.cableforum.co.uk/board/12...al-levels.html

And no they haven't changed!

Gar · 31-05-2011, 19:39

Quote:

Originally Posted by pip08456

They've been here for a loooooooong time if you cared to look!

http://www.cableforum.co.uk/board/12...al-levels.html

And no they haven't changed!

There's no need to be so rude. I checked that thread but noticed that the last update was in 2009. Which is why I asked for the latest optimum levels (in case things had since changed).

pip08456 · 31-05-2011, 19:57

Quote:

Originally Posted by Gar

There's no need to be so rude. I checked that thread but noticed that the last update was in 2009. Which is why I asked for the latest optimum levels (in case things had since changed).

a) You did't say you'd checked the sticky.

b)Had you said "I've checked the power level sticky are they still the same?"

The answer you would've got would be along the lines of "Yes otherwise the sticky would've been changed!"

Sticky's are there for a reason, pointing it out is not rude!

Gar · 31-05-2011, 21:01

Sadly no luck with the attenuator. The connection was okay for a while and then decided to play it's old tricks. Experiment failed.

I meant to do this yesterday (Sorry, Sephiroth!), but here are my modem stats, in full:

Cable Modem Information
Cable Modem : DOCSIS 1.0/1.1/2.0 Compliant
MAC Address : ***
Serial Number : ***
Boot Code Version : 3.1.6d
Software Version : 2.94.1015
Hardware Version : 1.19

Cable Modem Status
Item Status Comments
Acquire a Downstream Channel 402750000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational

Cable Modem Downstream
Downstream Lock : Locked
Downstream Channel Id : 7
Downstream Frequency : 402750000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 5360.537 Ksym/sec
Downstream Interleave Depth : taps32Increment4
Downstream Receive Power Level : 7.7 dBmV
Downstream SNR : 41.8 dB

Cable Modem Upstream
Upstream Lock : Locked
Upstream Channel ID : 2
Upstream Frequency : 25800000 Hz
Upstream Modulation : QPSK
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 44.5 dBmV
Upstream Mini-Slot Size : 2

Cable Modem Upstream Burst
Req Init Maint Per Maint Short Data Long Data
(1)(3)(4)(5)(6)
Modulation Type QPSK QPSK QPSK QPSK QPSK
Differential Encoding Off Off Off Off Off
Preamble Length 64 128 128 100 80
Preamble Value Offset 396 6 6 396 396
FEC Error Correction (T) 0 5 5 3 9
FEC Codeword Information Bytes (k) 16 34 34 78 232
Scrambler Seed 338 338 338 338 338
Maximum Burst Size 0 0 0 35 254
Guard Time Size 8 48 48 25 134
Last Codeword Length Fixed Fixed Fixed Short Short
Scrambler on/off On On On On On

Cable Modem Operation Configuration
Network Access : Allowed
Maximum Downstream Data Rate : 10240000
Maximum Upstream Data Rate : 1072000
Maximum Upstream Channel Burst : 8160
Maximum Number of CPEs : 1
Modem Capability : Concatenation Enabled, Fragametation Enabled, PHS Enabled

Event logs (wouldn't allow me to clipboard copy, so they are a bit messy):

Spoiler:

Trace route to BBC website:

Spoiler:

Make of those results what you will, because I'm clueless. Any insight would be greatly appreciated. Thanks.

craigj2k12 · 31-05-2011, 21:03

Quote:

Originally Posted by Gar

Cable Modem Upstream
Upstream Lock : Locked
Upstream Channel ID : 2
Upstream Frequency : 25800000 Hz
Upstream Modulation : QPSK
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 44.5 dBmV
Upstream Mini-Slot Size : 2

QPSK modulation indicates noise on the network

General Maximus · 31-05-2011, 21:14

is your connection actually working atm? ICMP is an IP protocol which means you must have leased an ip address from the cmts

pip08456 · 31-05-2011, 21:16

Quote:

Originally Posted by craigj2k11

QPSK modulation indicates noise on the network

I'm not replying in case I'm rude again!