Cable sharing adapter for the simultaneous operation of two 4-wire services, here: 2 x telephone (ISDN), via an 8-wire installation cable, used in pairs: one adapter on the connection box, one adapter on the distributor, shielded adapter with transmission properties of class E in the link according to IEC 11801 and DIN EN 50173-1, can be plugged next to each other due to the slim design, short, flexible connection, delivered as a set of 2