Diese Information is from Wikipedia.org
Reichle connector is the colloquial term for the current, six-pin connector from the Swiss telephone type TT87 and TT89 (also T + T + T87 and T89). TT89 denotes the angle connector, where can the veins of a flat phone cable with the insulation piercing technique of pressing without tools weighing TT87 while the straight plug, in which the pins must be fixed microstructure by means of a special machi .
TT87 is made up of mainly sold before cables. The appropriate telephone socket is referred to as TT83 or T + T83.
They are named after the company, who developed it, the Reichle & De-Massari AG.