No response as yet! I have been scouring the internet looking for a solution without much success. What I have discovered so far follows.
The 2710n router is renowned for reserving about 20-25% of bandwidth as part of the "switched off" QofS feature. On the upload side that is quite significant especially for Skype. I have not seen anything that stands out as a clear solution to this issue.
There is also some talk about using telnet commands to switch off the "switched off" QofS feature and increase rxpct & txpct from the auto setting to 100%. I have tried that and the improvement is marginal - at least using the broadbandspeedchecker.co.uk testing tool (315-320 Kbps up to 340-345Kbps for uploading). I haven't yet been able to test out skype after the change.
The other issue is firmware. Mine is as follows (copied directly from the router status page:
Model Name : Vigor2710n Firmware Version : 3.3.6_232201 Build Date/Time : Oct 27 2010 17:03:51 ADSL Firmware Version : 232201_A Hardware: Annex A
I have found a new release as follows:
Firmware Version : 18.104.22.168 (Release) Release Date : 14th April 2011 Build Date : 22nd March 2011 Applicable Models : Vigor2710, Vigor2710n, Vigor2710Vn, Vigor2710VDn Locale : UK Only / Annex A Only.
I am not sure whether it is worth upgrading or not. I wonder if anyone out there has done so and what their experience is?