CBS has sold almost all of its advertising slots for the Fall season, with combined sales of around $1 billion.

Whilst all other networks, spearheaded by NBC, decided to cut their ad rates in response to a slowing economy, CBS held tight.

The high sales rate is most likely down to the success of high-profile series such as Survivor and CSI: Crime Scene Investigation, as well as an 8 point increase in the 18-49 demo.

A CBS spokesman refused to comment on sales revenue, but did say: "As we continue to sell, we're more concerned about pricing than volume."

Insiders predict the total figure could end up as high as $1.7 billion.