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(Unregistered)Thu 27-Jan-11 12:36:02
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IP Profile problem

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My Netgear router packed up last night so I set up a new unused but "old" BT HomeHub. Worked fine . Tested my connection and IP Profile was down to 500k, instead of consistent 1500k before. Conatcted BT, very helpful, said they would get my profile back up to 1500k which it was early this morning. Checked at 10 am and back to 750k. Looked at event log in BT Homehub advanced and see this.....

Jan 27 09:56:23 GRP Default destination is routed via gateway

Info Jan 27 09:56:23 xDSL linestate up (downstream: 864 kbit/s, upstream: 448 kbit/s; output Power Down: 15.5 dBm, Up: 11.5 dBm; line Attenuation Down: 63.5 dB, Up: 31.5 dB; snr Margin Down: 16.5 dB, Up: 14.0 dB)

Info Jan 27 09:55:58 FIREWALL event (1 of 13): enabled rules

Info Jan 27 09:55:58 GRP Default destination is not routed anymore via gateway

Info Jan 27 09:55:58 xDSL linestate down

Have always had a SNR down of about much higher!

Anyone got a clue as to what might be going on? Anything to do with the BT Hub? Should I get another Netgear? Have had a good stable 1500 for some years now, would like to get it back.
Many thanks,

Standard User panda
(committed) Thu 27-Jan-11 13:36:53
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Re: IP Profile problem

[re: Anonymous] [link to this post]
It look like the DLM has increased the target margin, hence the reduction in sync speed.
This may have been due to the previously faulty router, or possibly something else.
Reboot the router and check the margin immediately upon reconnection. If it's still =>15 then you can either wait for weeks for DLM to reduce the margin (assuming you maintain a consistent connection), or ask your ISP to reset the Margin manually.

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Standard User iwish
(committed) Thu 27-Jan-11 18:28:10
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Re: IP Profile problem

[re: panda] [link to this post]
I have found the the BT DLM is very sensitive of late
I did one reboot after 6 days uptime and it set my snr from 6 to 12
All errors where low
Errors are still low and the DLM has now put a cap on my download sync to 3070
because i did a reboot every 3rd day
ISP have put a request for BT to remove the cap and investigate why this has happened

Edited by iwish (Thu 27-Jan-11 18:29:13)

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(Unregistered)Thu 27-Jan-11 23:36:32
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Re: IP Profile problem

[re: iwish] [link to this post]
I have reinstated my Netgear router and it is working fine! Can't be sure now that it was broken before. Bt test shows aIP Profile as 750kbps, half what my line should be.
These stats below are from the Netgear. My down snr has fallen to 4 db...that is good isn't it? Is the fact that the up snr is 16db the reason the profile has been reduced? If so what could be causing it? What do they show you experts? I would love to know. Your help gratefully received. Bt have promised a visit from engineer in one week's time.


Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time
WAN PPPoA 100728 154666 0 301 5742 09:35:48
LAN 10M/100M 130899 78810 0 5086 218 09:37:14
WLAN 11M/54M 33340 32241 0 772 180 09:37:05

ADSL Link Downstream Upstream
Connection Speed 2208 kbps 448 kbps
Line Attenuation 63 db 15.5 db
Noise Margin 4 db 16 db
Standard User RobertoS
(sensei) Fri 28-Jan-11 13:26:10
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Re: IP Profile problem

[re: Anonymous] [link to this post]
Daylight re-syncs are nearly always best, but avoid doing several close together.

The IP Profile may already have risen automatically to 1750kbps with that sync. If it hasn't, it will soon. If a daytime sync get 2272kbps then in a few days the profile would rise to 2000kbps smile.

See the table on this page.

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