The concern of this Recommendation is the transmission performance of an analogue international exchange in terms of design objectives [1].Related commissioning objectives [1] may be based on this Recommendation.For the purposes of this Recommendation an analogue international exchange is a collection of equipment regarded as an entity by the Administration concerned. In the case of an analogue international transit exchange,it extends from the end of the incoming international line (point A of Figure 1/Q.45 bis) to the beginning of the outgoing international line (point D of Figure 1/Q.45 bis).Exchange testing uses measuring points at boundaries of the same exchange individually agreed upon.In contrast to exchange testing,circuit testing [2] is recommended between circuit access points expected to be located at or near by the actual analogue switching points (points B or C of Figure 1/Q.45 bis).For the purpose of circuit line-up and maintenance procedures,automatic international exchanges should be provided with circuit test access points.Applying this Recommendation due account should be taken to the different constitution of the section of transmission under test compared to circuit testing [2].