Norfolk's economy could stall if the county is not provided with access to next-generation broadband, it has been claimed.
Phil Harris, Managing Director of Norwich IT firm Norcom Technology, said that if firms find it difficult to transfer data in East Anglia, they are likely to locate themselves elsewhere in the country.
At the same time, a lack of access to high-speed web-services may urge established local firms to consider moving elsewhere, he said.
Mr Harris, technology spokesman for Norfolk Chamber of Commerce, commented: "It's like being left on a single carriageway when elsewhere they have motorways.
"When the speed of broadband increases, new services will start making use of that greater speed and if we haven't got fast broadband, we will not get any of those new services."
Back in September, broadband provider BT said it had started to upgrade telephone exchanges in Norfolk to increase broadband speeds available in East Anglia.