Dj's right that setting can be the same time as the lengh of the game in FT. The server disconect is on the main config
// Client Download Settings, 0 = off, 1 = on. Used for MODs and custom maps.
set sv_allowdownload "1"
seta sv_wwwDownload "1"
seta sv_wwwBaseURL "http://your.redirect.com/cod5"
seta sv_wwwDlDisconnected "0"
The problem there is it's main use is to stop people from downloading forever and screwing up the game. So if you set it to 3 minutes you get 3 minute of downloading the new map before it releases you and lets somebody else use that spot. At the same time it hold you for 3 minutes in the case of duplicate qport. After 3 minutes you can go back and try to get back in. So the best way is close the game and restart it. Or find an admin or hope an admin see's your stuck.