Abstract: An insulation displacement contact (IDC) is capable of securely terminating wires having a wide range of diameters. The IDC is also designed to withstand repeated terminations of wires having diameters at the large end of the supported size range while remaining capable of securely terminating wires having diameters at the small end of the range. To these ends, the IDC comprises two or more distinct flex regions. At least one of the flex regions has an associated mechanical stop that limits the degree of deformation that can be applied to that region as a wire is being terminated on the IDC. If the diameter of the wire being terminated on the IDC is large enough to deflect the first flex region to the end of its deflection range, the mechanical stop is engaged, causing further deflection to be transferred to the next flex region.

Abstract: A connector for a communications system provides desired levels of crosstalk by controlling the positions and lengths of the wires. A plurality of insulation displacement contacts are movable between retracted positions and inserted positions extending into an internal chamber of the connector. A first insert disposed in the internal chamber has a front end proximal the front end of the plug housing. A second insert is partially disposed in the internal chamber and has a front end proximal the first insert rear end. Four pairs of wires extend from a cable sheath. Each pair of wires pass through one of the first, second, third and fourth channels of the second insert and through the first passageway of the first insert to the insulation displacement contacts in the internal chamber.

Abstract: A connector for a communications system provides desired levels of crosstalk by controlling the positions and lengths of the wires. A plurality of insulation displacement contacts are mounted in slots in the plug housing for movement between retracted positions and inserted positions extending into the internal chamber. A first insert is disposed in the internal chamber. A second insert is partially disposed in the internal chamber and has a front end proximal the first insert rear end. The second insert has first, second, third and fourth channels extending from the rear end to the front end of the second insert. Four pairs of wires extend from a cable sheath and pass through one of the first, second, third and fourth channels of the second insert and through a first passageway in the first insert to the insulation displacement contacts in an internal chamber of the connector.

Abstract: A connector for a communications system provides desired levels of crosstalk by controlling the positions and lengths of the wires. The connector has an internal chamber opening on the rear end of the plug housing and defined by housing walls. A plurality of slots extend through one of the housing walls adjacent its front end and into the internal chamber. A plurality of insulation displacement contacts are mounted in the slots for movement between retracted positions and inserted positions extending into the internal chamber. A first insert is disposed in the internal chamber. The first insert has a front end proximal the front end of the plug housing. A first passageway extends from the front end of the first insert to the rear end of the first insert. A plurality of openings in a first insert wall adjacent the front end are aligned with the plurality of slots in the plug housing and extend into the first passageway.

Abstract: A connector for a communications system provides desired levels of crosstalk by controlling the positions and lengths of the wires. The connector has an internal chamber opening on the rear end of the plug housing and defined by housing walls. A plurality of slots extend through one of the housing walls adjacent its front end and into the internal chamber. A plurality of insulation displacement contacts are mounted in the slots for movement between retracted positions and inserted positions extending into the internal chamber. A first insert is disposed in the internal chamber. The first insert has a front end proximal the front end of the plug housing. A first passageway extends from the front end of the first insert to the rear end of the first insert. A plurality of openings in a first insert wall adjacent the front end are aligned with the plurality of slots in the plug housing and extend into the first passageway.

Abstract: A connector for a communications system provides desired levels of crosstalk by controlling the positions and lengths of the wires. The connector has an internal chamber opening on the rear end of the plug housing and defined by housing walls. A plurality of slots extend through one of the housing walls adjacent its front end and into the internal chamber. A plurality of insulation displacement contacts are mounted in the slots for movement between retracted positions and inserted positions extending into the internal chamber. A first insert is disposed in the internal chamber. The first insert has a front end proximal the front end of the plug housing. A first passageway extends from the front end of the first insert to the rear end of the first insert. A plurality of openings in a first insert wall adjacent the front end are aligned with the plurality of slots in the plug housing and extend into the first passageway.

Abstract: A connector for a communications system provides desired levels of crosstalk by controlling the positions and lengths of the wires. The connector has an internal chamber opening on the rear end of the plug housing and defined by housing walls. A plurality of slots extend through one of the housing walls adjacent its front end and into the internal chamber. A plurality of insulation displacement contacts are mounted in the slots for movement between retracted positions and inserted positions extending into the internal chamber. A first insert is disposed in the internal chamber. The first insert has a front end proximal the front end of the plug housing. A first passageway extends from the front end of the first insert to the rear end of the first insert. A plurality of openings in a first insert wall adjacent the front end are aligned with the plurality of slots in the plug housing and extend into the first passageway.

Abstract: A DTMF encoder at a central office is connected to a spare pair of a feeder cable for remotely controlling with a 5-digit number a series of relay coil matrices where the coils perform latch and release functions for 50 latching relays in each matrix. Two of the digits select the matrix and two other digits select the relay coil to be energized. The fifth digit selects the crossconnect box or pedestal from a plurality of the same. The 50 relays are connected in pairs to serve 25 incoming pairs, each pair of relays being arranged to selectively connect its associated incoming pair to any one of three corresponding outgoing pairs or terminals. Energizing current is supplied to a selected coil only upon receipt of the last of the five digits and only for a brief interval. Power for the remote apparatus is supplied from the central office via a phantom circuit over the same spare pair.

Abstract: A disconnecting device is inserted in a two-wire communication loop near the far end thereof. The device contains a latching winding of a latching relay which winding is inserted in series with one side of the loop. The winding controls two normally closed contact pairs, one pair being inserted in series with each side of the loop to disconnect a far end telephone or the like when the winding is energized. A shunt diode and capacitor prevent activation of the latching winding by normal battery and signal current. Reverse polarity voltage of greater value than normal battery will activate the latching winding and effect far end disconnection. A reset winding of the relay is connected in series with a diac, a diode, a time constant resistor and a normally open pair of contacts of the latching relay, across the loop. Each of the normally closed contact pairs is shunted by a resistor to permit current flow past the contacts when open.