The Return Error component
Return Error Component Mandatory indication
Component Type Tag Mandatory 1 0 1 0 0 0 1 1
Component length 1)
Invoke ID Tag Mandatory
Invoke ID length
Invoke ID
Error Code Tag Optional Local 0 0 0 0 0 0 1 0
Global 0 0 0 0 0 1 1 0
Error Code length
Error Code
Parameters 2) and 3) Optional
NOTE 1 - The component length is coded to indicate the number of octets contained in the component (excluding the component type tag and the component length octets).
NOTE 2 - The coding is supplementary service specific and the subject of other Recommendations.
NOTE 3 - It is a parameter within ROSE, but in the ISUP it is a subfield within a field.
Table 15/Q.763 - Coding of Error Code Tag
The Global Error Code is coded as an Object Identifier, which is described in Recommendation X.209.
7) Error Code Tag
Each error is assigned a value to identify it. Errors can be classified as local or global errors. A local error code follows the Error Code Tag and Error Code Length. The Error Code Tag is coded as shown in Table 15.