ocr: Basic access digital section V, (See Note 2) ------ ET (Note 5) Generic digital section V, - ET (Note 3) (Note 4) Generic subscriber access digital section V. - ET (Note 31 Digital access link (static multiplex) T - - - ET 1 (Note 3) Z Subscriber analogue line (2-wire) ET Interfaces T1108841-88 Analogue Reference points Digital ET Exchange termination functions Note I 1 Not all interfaces will necessarily exist in every implementation. Note 2 The characteristics of a digital transmission system on metallic local lines for ISDN basic rate access which may form part of the basic access digital s ...