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Conventions Used in This Document
Issue 7 March 1998
xxxix
■ Denial (NAK) Cause(s)
This heading designates a negative acknowledgement (NAK) from the
ECS. This means that the information provided by the adjunct to the ECS
was incorrect; for example, one of the parameters, such as the call_id, was
incorrect. At this point the ECS rejects the request and terminates the
communication channel between the ECS and the adjunct. The ECS also
provides a reason why the operation was not performed. These reasons or
causes fall under the Denial (NAK) Cause(s).
Each ASAI capability contains a Denial (NAK) section with a list of cause
values most commonly occurring. An attempt was made to have these lists
complete. However, due to various unpredictable ECS/feature interactions,
it is not possible to provide a complete list. Therefore, application and ASAI
library writers should be able to handle any other (valid) cause values not
listed under the particular capability.
■ Protocol (NAK) Error Cause(s)
This heading designates a protocol processing error.
■ Considerations
This heading provides the user with any special information that should be
taken into account for a particular capability.