Dass

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Dass is a surname, and may refer to:

DASS

The Digital Access Signalling System (DASS) is the UK proprietary standard created by BT to provide ISDN services in the UK. The first incarnation DASS1 is now obsolete and has been replaced by DASS II. This itself will become obsolete over the coming years as Q.931, a European standard becomes widely adopted in the EEC.

DASS II is purely a protocol used to control data flow across the ISDN doing a similar job to the protocols used with modems when sending the data over the analogue PSTN. It is more highly specified and controlled and operates at higher speeds.


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