connecting main link

    the main link of fcd-2 have two line interfaces: a 120ω balanced line interface terminated in a 15-pin, d-type fema]e connector, and a 75ω unbalanced interface terminated in two bnc female coaxial connectors.

    do not connect to both balanced and unbalanced connectors!

    1 to connect the balanced interface:

    connect the dte cable to the d-type, 15-pin female connector designated cept link.

    2 to connect the unbalanced interface:

    connect the dte cable to the two bnc connectors designate rx-in and tx-out. pay attention to the correct connection of the receive and transmit cables to the rx and tx connectors.

    connect the unit to the mains before connecting it to the e1 line.

    connecting data channel

    fcd-2 supports three types of data channel interfaces. connector pin allocations and cable wiring data appear in appendix a.

    1 when using the v.35 interface, equipment with v.35 interface can be directly connected to the data channel connectors.

    2 when using the x.21 interface, equipment with x.21 interface can be directly connected to the data channel connectors.

    for the v.35 and x.21 interfaces, use the following types of cables:

    (1)when fcd-2 is used in the dce mode, use a straight-through cable to connect the data terminal equipment (dte).

    (2)when fcd-2 is used in the dte mode, or when the dte is connected via a tail-end circuit, use cross-over cable.

    3 when using the rs-530 interface, equipment with rs-530 interface can be directly connected to the data channel connectors.

    equipment with v.36/rs-449/422 can be connected by means of adapter cables, supplied with the unit. table 2-2 lists these cables and describes their applications.

   

    when using the adapter cables, first connect the cable to the fcd-2 data port, then connect the user's data cable to the adapter connector.

    the various user interface cables should be shielded, in order to comply with fcc rules. fcd-2 and its data interfaces work well even if the cables are not shielded, but some radio interference may occur.

    connecting supervisory port

    connect a cable prepared in accordance with appendix a between the supervisory port connector and the supervision terminal. if the supervision terminal is connected via modems, use a cross-over cable. to enable communication with fcd-2, the supervisory terminal should be set to the same data rate, data word format and parity type as fcd-2, before you start operations.