BT iNet has been operating since June and specialises in Lan, IP telephony, wireless networking, managed services and security.
Dave Carrington, former managing director of BT SkyNet, has been appointed managing director of BT iNet.
"The launch of iNet is a major milestone in BT's long-term strategy to be the leading provider of IP-based network services in the UK," said Tom Craig, president of IP networking at BT Global Services.
BT iNet combines the strengths of BT SkyNet and BT TNS in the UK Lan market with BT's experience in wide-area networking, according to Craig.
The integration of the two companies was timed to allow both entities to complete their respective financial years.
Why does Facebook store "my entire call history with my partner's mum", asks developer who requested his Facebook data
Facebook database included text-message metadata - despite not using Facebook Messenger for SMS
Before Ocado could start selling the technology it had developed to other retailers, it had to tear down and rebuild its own monolithic architecture
Successful attack could result in harm to patients and financial loss, warns NHS governing body
Guccifer 2.0 claimed to be a lone Romanian hacker - until a schoolboy error gave him, her or them away