SwitchlP ,provider of voice data and videoconferencing over broadband ,has signed a contract with BT Wholesale that enables it to buy BT DataStream direct, one of the key components of its InPurple solution, instead of relying on third party suppliers InPurple delivers all its content using BT's UKwide broadband network but SwitchlP owns and maintains connections into BT and the Internet in order to provide its Quality of Service and centralised management capabilities