T 4.40 Unsuitable fitting out of the RAS client operational environment

Often RAS connections cannot be established due to incompatibility of the technical equipment. But even where the technology is compatible the connection can fail if dial-in points for the relevant service provider are lacking or cannot be accessed. The threats which can occur in this area include the following:

• The power parameters between RAS client and remote location are incompatible (220V/110V).

• The modem connections between RAS client and remote location are incompatible.

• The switched network that is normally used (telecommunication service provider, Internet service provider) is not available at the remote location.

• The remote phone number is transmitted incorrectly or in an incompatible manner to the RAS server (where authentication is effected using Calling Line Identification Protocol, CLIP).

Moreover, it is virtually impossible to consider all the possible technical problems which can occur in any operational environments when planning the RAS system.