UMTS (Universal Mobile Telecommunications System): The European implementation of the 3rd generation mobile phone system, and the successor to GSM. Planned to provide global roaming, streaming video and personalized features. UMTS is expected to deliver up to 2 Mbps or roughly 40 times the speed of a 56 Kbps modem.
Upstream: Term used to describe traffic and paths that go from the subscriber to the headend.