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  2. 66 block - Wikipedia

    en.wikipedia.org/wiki/66_block

    A split-50 M-type 66 block with bridging clips attached. A 66 block is a type of punch-down block used to connect sets of wires in a telephone system. They have been manufactured in four common configurations, A, B, E and M. [a] A and B styles have the clip rows on 0.25" centers while E and M have the clip rows on 0.20" centers.

  3. Punch-down block - Wikipedia

    en.wikipedia.org/wiki/Punch-down_block

    A 66 block (or "M Block") is used in older analog telephone systems. [4] A 110 block is often used in residential telephone and Cat 5 wire systems, replacing 66 blocks. [4] A Krone block is a proprietary European alternative. A BIX block is a proprietary block developed originally by Nortel Networks.

  4. Tip and ring - Wikipedia

    en.wikipedia.org/wiki/Tip_and_ring

    Their names are derived from the telephone plugs used for connecting telephone calls in manual switchboards. One side of the line is connected to the metal tip of the plug, and the second is connected to a metal ring behind the tip, separated and insulated from the tip by a non-conducting material. When inserted into a jack, the plug's tip ...

  5. Demarcation point - Wikipedia

    en.wikipedia.org/wiki/Demarcation_point

    Newer NTE-5 master phone sockets have a removable front panel: the front panel and its wiring is the customer's, while the rear wiring is Openreach's. The removable panel allows separation of these two parts and independent maintenance, and access to a test socket to determine whether line faults are in the customer's wiring or Openreach's ...

  6. Telephone jack and plug - Wikipedia

    en.wikipedia.org/wiki/Telephone_jack_and_plug

    telephone line to phone cord: The wall jack. This connection is the most standardized, and often regulated as the boundary between an individual's telephone and the telephone network. In many residences, though, the boundary between utility-owned and household-owned cabling is a network interface on an outside wall known as the demarcation ...

  7. Main distribution frame - Wikipedia

    en.wikipedia.org/wiki/Main_distribution_frame

    The MDF is a termination point within the local telephone exchange where exchange equipment and terminations of local loops are connected by jumper wires at the MDF. All cable copper pairs supplying services through user telephone lines are terminated at the MDF and distributed through the MDF to equipment within the local exchange e.g. repeaters and DSLAM.

  8. BIX (telephony) - Wikipedia

    en.wikipedia.org/wiki/BIX_(telephony)

    BIX connectors are rectangular punch-down blocks used to terminate up to 25 pairs. The connectors have a slip-in fitting which automatically strips the wire as it is punched down, eliminating the need for pre-stripping. BIX connectors also have a pair-splitter to facilitate fast arranging of wires on the punch-down block.

  9. Local loop - Wikipedia

    en.wikipedia.org/wiki/Local_loop

    Local Loop. In telephony, the local loop (also referred to as the local tail, subscriber line, or in the aggregate as the last mile) is the physical link or circuit that connects from the demarcation point of the customer premises to the edge of the common carrier or telecommunications service provider's network.