| 摘要 |
A locking device for preventing unauthorized access to a telephone subscriber circuit jack located at a building entrance terminal structure or similar face is disclosed. The jack accommodates a plug having a manually engageable release member and defines a recess accommodating the jack. The locking device includes a housing element defining a generally rectangularly enclosed recess. Means within the recess locates the plug in predetermined position. A forward wall in the housing defines an opening opposite the plug which will provide access. A cover element is supported for selective movement relative to the housing element between first and second positions, the cover element being clear of the opening in the jack in a first position and at least partially overlying the opening in a second position. Latching means is provided on the cover element and locking means on the housing element engages the latching means for preventing movement of the cover from the first position to the second position.
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