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This ECMA Standard specifies the Physical Layer characteristics of the basic access interface between data processing equipment (DPE) and private switching networks (PSN), and is based on CCITT Rec. 1.430.
The interface concerned is at the S reference point as defined in CCITT Rec. 1.411. The reference configuration for the interface is given in Figure 1.
- ECMA-103, 1st edition, September 1985Download