Abstract: A packaging device for biological products, comprising a parallelepiped-shaped container having an upper face, a lower face, and two side faces extending in a longitudinal direction between two end faces and defining at least one first recess, the device comprising a distinct storage element to be housed immovably in the first recess of the container in a direction parallel to the longitudinal direction, the storage element comprising a storage zone for a first type of receptacle of biological products, the storage element and/or the container being conformed to bound at least one second recess for a second type of receptacle of biological products, the container comprising an opening on an end face provided for introducing or removing the storage element and/or the second type of receptacle, the device comprising a cover distinct from the container for selectively closing the opening.

Abstract: A circuit associated with a telephone line to detect line status includes a first detector sensitive to the line current phase, a second detector sensitive to the ringing voltage phase, and two pulse generators of the same frequency as the ringing voltage, appearing at the positive and negative zero-crossings of the ringing voltage, respectively. When only the ringing current is applied to the line, only the signals from both detectors and one generator are simultaneously present (once per period). When the called subscriber lifts his handset, the signals from both detectors and the other generator are also simultaneously present once per period. These pulse coincidences are detected and processed by an appropriate logic.