BT Datastream is a dedicated one-to-many broadband service that enables you to deliver your own broadband solutions through your own IP transport services, or other protocol.
Using DSL technology, BT Datastream allows an ordinary copper telephone line to support Asynchronous Transfer Mode (ATM)-based, high speed digital transmission. With the addition of your own IP layer, you can offer internet-based services to your customers.
The flexibility of ATM can be used to provide new data services to multiple End Users.
Service providers are responsible for providing the End User equipment and also need to purchase one or more 155Mbit/s or 622Mbit/s Customer Access Links, a virtual path to each exchange they wish to offer service from, and an End User Access for each of their End Users.
BT Datastream consists of three components
These components are not sold separately outside the full BT Datastream service and must be used together. Service providers are responsible for providing the equipment that goes to make up the components; this is outlined below.
| BT Datastream | |
|---|---|
| The Customer Access Link (CAL) | This is the link from the Network Termination Equipment (NTE) in your premises to a BT Datastream Point of Presence; or, alternatively, an ATM Access Port on a BT ATM switch, at a BT Datastream Point of Presence. Service providers connect to the BT ATM core network through a 155Mbit/s or 622Mbit/s CAL which is provided solely by BT or by interconnecting using ATM in-span handover. The data is then carried over dedicated virtual paths through the BT network to the End User’s local exchange. |
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| Virtual paths (VP) | A VP creates the route from your premises, or point of handover in the case of in-span handover, to the BT Datastream exchanges where your End Users are served from. A number of VP service classes are available providing a first step in allowing Service Providers to offer voice, data, internet, video, gaming and more over both ADSL and SDSL End User products. Please note that CBR and VBR-rt Service Classes are not available at all BT Datastream enabled exchanges. |
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| End User Access (EUA) | Please go to the Service Provider Price List |
There is a choice of five ADSL services
| ADSL Services | |
|---|---|
| BT Datastream Max | rate adaptive line rates between 288Kbit/s and 8128Kbit/s downstream and 448Kbit/s upstream |
| BT Datastream Max Premium | rate adaptive line rates between 288Kbit/s and 8128Kbit/s downstream and 832Kbit/s upstream |
| BT Datastream Office 500 | up to 576Kbit/s downstream; rate adaptive from 64Kbit/s up to 288Kbit/s upstream (ATM cell rate including headers). |
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| BT Datastream Office 1000 | up to 1152Kbit/s downstream; up to 288Kbit/s upstream (ATM cell rate including headers). |
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| BT Datastream Office 2000 | up to 2272Kbit/s downstream; up to 288Kbit/s upstream (ATM cell rate including headers). |
Please note that BT Datastream cannot currently co-exist on the same line with other DSL based services. The product is only available over a BT provided direct exchange line or Calls & Access Line.
