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.