This Recommendation specifies the Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma for the user attached to the T_B reference point or coincident S_B and T_B reference point (as defined in ITU-T I.413 [6]) of implementations conforming to the procedures for the modification of the peak cell rate traffic parameter by the connection owner in the active phase of the call of the Digital Subscriber Signalling System No. 2 (DSS2) protocol for the Broadband Integrated Services Digital Network (B-ISDN), ITU-T Q.2963.1 [1].

Other Recommendations of the Q.2963.1 family specify the Protocol Implementation Conformance Statement (PICS) proforma and Test Suite Structure and Test Purposes (TSS & TP) based on this Recommendation.

This Recommendation is applicable to equipment, supporting the modification of the peak cell rate traffic parameters of the connection in the active phase of the call by the connection owner, to be attached at either side of a T_B reference point or coincident S_B and T_B reference point when used as an access to the public B-ISDN.

The ATS realizes test purposes identified in the TSS & TP part of the Recommendation and groups them according to the test suite structure given in the TSS & TP. Test purposes defined in the TSS & TP part but not testable are identified in this Recommendation.

The supplier of a protocol implementation that is claimed to conform to ITU-T Q.2963.1 [1] is required to complete a copy of the PICS proforma and the PIXIT proforma provided by the testlab. The PIXIT proforma shall contain the tables identified in the partial PIXIT proforma part of this Recommendation and may contain additional information required by the testlab to be able to appropriately execute the test campaign.