Unlocking BT 2Wire 2700HGV Business Hub (wireless router)


Contents > BT v5.29.107.x firmware installation:




Wireless causes ADSL line to drop out

Last updated 8 Oct 10

On going Investigation - this may be an isolated case(s).  Nothing really new to report since I first reported this issue in December 2009.


While testing BT v5.29.107.19 firmware for severals weeks to mid November 09, I observed a particular behaviour with my Dual SSID hub.  At first I dismissed it but Neil B.  reported similar symptoms when trying to use wireless to download files when using BT v5.29.107.12/19 recovery firmwares - he found the problem was resolved by using Singtel firmware on his new Dual SSID hub.  I decided to return to investigate what I had previously observed on my own hub a few weeks ago.

I should add it is possible my ageing Dual SSID 2700HGV hub in question could have developed a fault, or something which I have yet to uncover has triggered this behaviour.  The only significant change is I have installed BT v5.29.107.19 recovery firmware to this particular hub in Sept 2009 and this is when I first noticed the issue.   I am still investigating and compiling information.


Around once a week,  I may use uTorrent (Bittorrent client) to download large file.  It is usually over 300Mb in size and is usually completed in around 15 minutes on my 5.5Mbps ADSL line.  This task stresses my ADSL connection.

But I observed lately, when the download is completed, the ADSL line would immediately drop momentarily.  The line would recover and resync very quickly.


uTorrent/Bittorrent Test Results in chronological order conducted on 4 Dec 2009




BT v5.29.107.19 with Enhanced Services (hub no. 1) 802.11g only


ADSL drops out.  Test repeated 3 times (Nov 09)

BT v5.29.107.12 with Enhanced Services (hub no. 1) 802.11g only


ADSL drops out.  Test repeated 2 times.

BT v6. (hub no. 2) 802.11g only



BT v5.29.107.12 with Enhanced Services (hub no. 1)



BT v5.29.107.12 with Enhanced Services (hub no. 1) 802.11g only


ADSL drops out.  

BT v5.29.107.12 factory reset (hub no. 1) 802.11g only


ADSL drops out.

BT v5.29.107.12 factory reset (hub no. 1) 802.11b only


OK.   Eureka !

BT v5.29.107.12 factory reset (hub no. 1) 802.11b/g


ADSL drops out.

BT v5.29.107.12 factory reset (hub no. 1) 802.11g only with new PSU


ADSL drops out.

Singtel v5.29.117.3 (hub no. 1) 802.11g only with new PSU



BT v5.29.117.6 (hub no. 3) 802.11g


OK (Added 16 Dec 09)


hub no. 1 - Dual SSID 4201-003003-007 Early 2007 model.

hub no. 2 - Dual SSID 4201-003003-008 Early 2008 model.

hub no. 3 - Dual SSID 4201-003003-008 Mid 2008 model.

Firewall port forwarding rule set up for uTorrent.

2700 Firewall Advanced Settings: 'Excessive Session Detection' and 'Miscellaneous' check boxes unticked.

Wireless PC used for testing: Linksys WMP54G v4.1 RaLink based wireless chipset PCI wifi card (RT61 v1.2.8 driver).  WPA-PSK security.  uTorrent client v1.8.4

Line information:  ADSL1 IPstream, downstream attenuation 49dB, Noise margin 9dB. Typically 5.0-5.7Mbps.  IP profile 4500/5000kbps.


Given the BT v5.29.107.12 recovery firmware has been around for a while and there has been no other readers reporting similar issues to me, this may just be an isolated incident.

At the moment, I am speculating that installing BT v5.29.107.19 recovery firmware has created this issue for my hub.  Reverting back to BT v5.29.107.12 firmware did not fix the problem on my hub.  Having said that, Neil B reported he first noticed his ADSL dropout issue with v5.29.107.12 and later tried .19 to see if it was any better.  Both Neil B and myself have observed, installing later SingTel v5.29.117.3 can resolve the ADSL drop out issue in our situations. 

The only other change I have made is to update the RaLink wireless driver in October.  Previously using v1.2.3.  Presently using v1.2.8.

The Detailed logs don't report anything unusual other than the broadband link has gone down as soon as the 'downloading' aspect of a bitorrent is completed.

The results showed that if I used 802.11b wireless mode, the ADSL drop out issue did not seem to occur.  Up to end of 2008 last year, I have always used 802.11b only and would have been using BT v5.29.117.6 or Singtel firmwares.  From 2009 onwards, I started to use 802.11g mode.  It is possible the issue experienced with bittorrents with BT v5.29.107.x firmwares had gone unnoticed as my ADSL line is not the best.   I would have been switching between BT v6, Singtel and BT v5.29.107.12 since March 09 and I don't think I used bittorrent much if at all between July and September.

Interim Solution:

If using BT v5.29.107.x recovery firmwares, try configuring the 2700 to use 802.11b wireless mode to resolve the problem.

Otherwise, use the Singtel v5.29.117.3 recovery firmware where possible.


Later, I will try and source a spare hub with v5 firmware to verify whether the ADSL dropout issue is specific to my particular 2700HGV.


If any other readers using BT v5.29.107.12 or .19 and has experience ADSL dropouts as a result of wireless activity, please let me know.



(Update 17 Sep 10): Matthew T. advises his hub is running v5.29.107.19 with 802.11b/g wireless on PlusNet at around 3.5mbps, and he too observes his hub drops the line connection under high loads when using iplayer and torrent activity.


(8 Oct 10):  I noticed this new thread posted on BT business broadband support forum on same subject.



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