UltraBEAM 1000 refers to the current highest-speed FTTP full-fibre broadband connection we provide.
We advertise this as providing anticipated speeds of 930Mb/s download and 100Mb/s upload speed.
Customers of our UltraBEAM 1000 service may find that they are able to get slightly higher than 930Mb/s download speeds, however unless they make a UDP transfer, they will not see the full 1Gb/s (1000Mb/s speeds) due to technical reasons.
Why is this not 1Gb/s (1000Mb/s) download? (Simple explanation)
This is due to the way that data is transmitted over data networks and the internet in packets of data.
These packets include various overheads that ensure that the data sent/received knows where to travel to and from, as well as error checking mechanisms.
These overheads take a portion of the space available in a packet such that the effect it appears as though the speed/bandwidth rate is lower than you expect.
The protocols that are used to transmit data over the Internet also slightly contribute to the reduction in capacity. TCP (transmission control protocol) has built-in congestion control and data integrity checks which may lead to a reduction in capacity. As most data transfers including speedtests use TCP, this can have the effect of displaying a lower speed. Whereas other Internet protocols such as UDP (User Datagram Protocol) is a simple connectionless model with minimal protocol mechanisms, and can effectively saturate the link. Therefore UDP transfers will more accurately stress test and prove the underlying capacity.