PDA

View Full Version : Are these ok on my modem config ?

telfordcable
15-03-2009, 23:16
I am on 10Mb and had a ambit 256 modem and are these config ok ?

Cable Modem Downstream
Downstream Lock : Locked
Downstream Channel Id : 5
Downstream Frequency : 339000000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 5360.537 Ksym/sec
Downstream Interleave Depth : taps32Increment4
Downstream Receive Power Level : 10.3 dBmV
Downstream SNR : 41.2 dB

Cable Modem Upstream
Upstream Lock : Locked
Upstream Channel ID : 2
Upstream Frequency : 34000000 Hz
Upstream Modulation : QAM16
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 35.5 dBmV
Upstream Mini-Slot Size : 2

Cable Modem Operation Configuration
Network Access : Allowed
Maximum Downstream Data Rate : 10240000
Maximum Upstream Data Rate : 512000
Maximum Upstream Channel Burst : 1600
Maximum Number of CPEs : 1
Modem Capability : Concatenation Enabled, Fragametation Enabled, PHS Disabled

Cable Modem Status
Item Status Comments
Acquire a Downstream Channel 339000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational

getting a transfer rate of 1.19MB/sec on microsoft site and linux iso

Sun, 15 Mar 2009 23:19:53 UTC

Test 1: 1024K took 882 ms = 1161 KB/sec, approx 9567 Kbps, 9.34 Mbps
Test 2: 1024K took 858 ms = 1193.5 KB/sec, approx 9834 Kbps, 9.6 Mbps
Test 3: 1024K took 858 ms = 1193.5 KB/sec, approx 9834 Kbps, 9.6 Mbps
Test 4: 2048K took 1700 ms = 1204.7 KB/sec, approx 9927 Kbps, 9.69 Mbps

Overall Average Speed = approx 9791 Kbps, 9.56 Mbps
xocemp
15-03-2009, 23:20
Downstream shouldn't get much higher than that, otherwise yes they are fine.
And for 10Mbit that speed is fine.
telfordcable
15-03-2009, 23:23
Downstream shouldn't get much higher than that

could you explain what you mean by this ?
xocemp
15-03-2009, 23:27
Recommended power range is -6dBmV to +15dBmV

Does anyone read stickies any more?
telfordcable
15-03-2009, 23:31
Recommended power range is -6dBmV to +15dBmV

Does anyone read stickies any more?

do you mean for downstream only or for upstream only or for both ?
xocemp
15-03-2009, 23:41
Cable modem signal levels (http://www.cableforum.co.uk/board/12/26006-cable-modem-signal-levels.html), sticky at the top of the forum.
Ignitionnet
16-03-2009, 06:34
Your speeds are fine, your performance is fine, there are no issues, don't obsess about your service DOCSIS has a wide operating range ;)

That sticky is actually kinda conservative, the operating range for 256QAM DOCSIS is still -15 to +15 and it can work outside those depending on SNR and modem tuner.
telfordcable
16-03-2009, 22:08
Your speeds are fine, your performance is fine, there are no issues, don't obsess about your service DOCSIS has a wide operating range ;)

That sticky is actually kinda conservative, the operating range for 256QAM DOCSIS is still -15 to +15 and it can work outside those depending on SNR and modem tuner.

Many thanks
Broadbandings
Retrovertigo
17-03-2009, 01:50
Rather than start a new thread and because I am clutching at straws now (50k [not a typo] download speeds of an evening) - which VM have said I should expect because the internet "gets busy in the evenings".

I'm on 20meg and my modem is a NTL:250 with a part number E08C007 on the bottom (it's a small black thing). if someone would be so kind just to see if anything stands out before I leave for another ISP out of desperation.

Downstream Lock : Locked
Downstream Channel Id : 7
Downstream Frequency : 330750000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 6952 Ksym/sec
Downstream Interleave Depth : taps12Increment17
Downstream Receive Power Level : 11.2 dBmV
Downstream SNR : 39.0 dB

Upstream Lock : Locked
Upstream Channel ID : 1
Upstream Frequency : 34000000 Hz
Upstream Modulation : QAM16
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 38.5 dBmV
Upstream Mini-Slot Size : 2

Network Access : Allowed
Maximum Downstream Data Rate : 20480000
Maximum Upstream Data Rate : 768000
Maximum Upstream Channel Burst : 1600
Maximum Number of CPEs : 1
Modem Capability : Concatenation Enabled, Fragametation Enabled, PHS Disabled

Acquire a Downstream Channel 330750000 Hz Locked
Connectivity State OK Operational
Boot State OK Operationa

As I say, speeds are appalling - I can sometimes scrape 2meg if I am lucky off newsgroups, but other than that I need to be online at maybe 3-4am to get maybe 10meg if I am lucky.

I don't want to leave but they are giving me no choice, simply doing the usual, reboot the modem routine. Speeds have been falling quickly over the last couple of months. Thanks for looking and hope the original poster doesn't mind me jumping in on this.
xocemp
17-03-2009, 02:22
Looking good.
Could you please open cmd and type: ping -n 10 bbc.co.uk
Paste the full results back.
Retrovertigo
17-03-2009, 10:50
Ok, bearing in mind I have a better connection mid-morning, here are the results

destination host unreachable
destination host unreachable
destination host unreachable
destination host unreachable
destination host unreachable
destination host unreachable
destination host unreachable
destination host unreachable
destination host unreachable
destination host unreachable

ping statistics for 212.58.224.138:

packets: sent=10, received = 0, Lost = 10 (100% loss)

Tried that several times with the same result each time.


I am guessing that shouldn't be like that? I usually play on Xbox Live of an evening but my mates have had to ask me to stop joining in because I am getting packet loss and really bad lag and ruining the experience for others (mainly a racing game and my car jerking around the track isn't much fun for everyone else), not the nicest situation having mates have to put you in such a position - but understandable.
broadbandking
17-03-2009, 11:03
Are you using a router or peer guardain?
Retrovertigo
17-03-2009, 11:29
I'm using a router but not, peer guardian?

I did try facebook.com just to see if numbers came up onscreen (even though I don't know what I'm doing and what they mean, and it did give some results).

Let me try again......

Pinging bbc.co.uk [212.58.224.138] with 32 bytes of data:

Reply from 212.58.224.138: bytes=32 time=24ms TTL=117
Reply from 212.58.224.138: bytes=32 time=57ms TTL=117
Reply from 212.58.224.138: bytes=32 time=51ms TTL=117
Reply from 212.58.224.138: bytes=32 time=26ms TTL=117
Reply from 212.58.224.138: bytes=32 time=66ms TTL=117
Reply from 212.58.224.138: bytes=32 time=41ms TTL=117
Reply from 212.58.224.138: bytes=32 time=39ms TTL=117
Reply from 212.58.224.138: bytes=32 time=59ms TTL=117
Reply from 212.58.224.138: bytes=32 time=93ms TTL=117
Reply from 212.58.224.138: bytes=32 time=48ms TTL=117

Ping statistics for 212.58.224.138:
Packets: Sent = 10, Received = 10, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 24ms, Maximum = 93ms, Average = 50ms

I think what I should do is do the same test this evening around 9-10pm and see how it differs. It's the evening when my problems really start.
Retrovertigo
17-03-2009, 20:53
This is the best result I have just managed to get this evening so far, most other results lost 3 or 4 packets...this is with my laptop connected straight to the modem:

Pinging bbc.co.uk [212.58.224.138] with 32 bytes of data:

Reply from 212.58.224.138: bytes=32 time=31ms TTL=117
Reply from 212.58.224.138: bytes=32 time=199ms TTL=117
Reply from 212.58.224.138: bytes=32 time=167ms TTL=117
Reply from 212.58.224.138: bytes=32 time=95ms TTL=117
Request timed out.
Reply from 212.58.224.138: bytes=32 time=51ms TTL=117
Reply from 212.58.224.138: bytes=32 time=149ms TTL=117
Reply from 212.58.224.138: bytes=32 time=109ms TTL=117
Reply from 212.58.224.138: bytes=32 time=46ms TTL=117
Request timed out.

Ping statistics for 212.58.224.138:
Packets: Sent = 10, Received = 8, Lost = 2 (20% loss)
Approximate round trip times in milli-seconds:
Minimum = 31ms, Maximum = 199ms, Average = 105ms