Ok we have:
Model Name : Vigor2800 series
Firmware Version : 2.7.1
Build Date/Time : Fri Sep 22 17:7:35.84 2006
ADSL Firmware Version : E.38.2.23 Annex A

Down: 896000 Up: 7456000 SNR: 14.5 LA: 20.0

We have a VoIP service configured in the router which has worked fine for a number of years. Unfortunately data traffic has increased dramatically which has worsened the quality of VoIP calls. I would appreciate details of how to configure the router so that some kind of priorty is given to the VoIP service.

With many thanks
David Bradley