Businesses in rural parts of Wales claim they are missing out on trade due to lack of broadband connectivity.
The businesses in Powys say they have been hamstrung by the local exchanges which use copper cables that are incompatible with broadband.
Dave Morgan, of the Cefn Lea conference centre, says that his firm is forced to turn down some clients because they stipulate that the site of their conference must have a broadband connection.
He told the Wales Daily Post: "It's not easy trying to operate with a slow internet connection.
"We recently lost two events to be staged by the Welsh Assembly because we could not offer a broadband connection."
Responding to the claims, a BT spokesman acknowledged the firms' frustration but said that the telecommunications giant had "never promised to provide broadband to everyone in Wales."
He added: "The aim has been to provide broadband to every telephone exchange in Wales and that we have now done. But clearly there are some reasons - technological issues or distance from exchange - which mean that not everyone can get broadband.
"However, in Wales more than 99 per cent of homes and businesses can now receive broadband. We appreciate the frustration felt by those relatively small number of homes and businesses in Wales unable to access the technology, and we are working closely with the Assembly to find alternative solutions."