Technical Details
The connections between the end users and the Other Logical Operator (OLO) (the wholesale customer of the DataStream product) are provided in three parts.
- BT provides connectivity between the end user and the nearest BT Serving Exchange via ADSL, SDSL, and FTTX. As of writing this, this end user access line can have a bandwidth ranging between 288 kbit/s and 8,128 kbit/s (8 Mibit/s) downstream and up to 832 kbit/s upstream for ADSL, and up to 2048 kbit/s (2 Mibit/s) for SDSL. For Fibre based connections, speeds can be as high as 100Mbit/s although most connections of this type are fibre from exchange to cabinet so therefore limited to a maximum of 40Mbit/s.
- For each serving exchange involved in providing end user access lines, a virtual path is provisioned to a BT ATM switch on BT's core network. A virtual path can range in size from 250 kbit/s to 34 Mbit/s. One or more DSLAMs at the serving exchange combine the traffic from the end user access lines for delivery to the ATM switch.
- From the BT switch, the traffic from the various virtual paths is combined and an ATM Customer Access Link (CAL) is used to connect to the Network Terminating Equipment (NTE) at the wholesale customer's point of presence.
Read more about this topic: Datastream
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