Configure EIA-530 Interfaces

Devices that communicate over a serial interface are divided into two classes: data terminal equipment (DTE) and data circuit-terminating equipment (DCE). EIA-530 is an Electronics Industries Alliance (EIA) standard for the interconnection of DTE and DCE employing serial binary data interchange with control information exchanged on separate control circuits. Juniper Networks EIA-530 Physical Interface Cards (PICs) have two ports per PIC and support full-duplex data transmission. These PICs support DTE mode only.

The following standards apply to EIA-530 interfaces:

• TIA/EIA Standard 530, High-Speed 25-Position Interface for Data Terminal Equipment and Data Circuit-Terminating Equipment, defines the signals on the cable and specifies the connector at the end of the cable.
• TIA/EIA Standard 232, Interface between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange, describes the physical interface and protocol for serial data communication.

To configure EIA-530 physical interface properties, include the serial-options statement at the [edit interfaces ei-fpc/pic/port] hierarchy level:

[edit interfaces ei-fpc/pic/port]

serial-options {

    clock-rate rate;

    clocking-mode (dce | dte | loop);

    control-leads {

        cts (ignore | normal | require);

        dcd (ignore | normal | require);

        dsr (ignore | normal | require);

        dtr (assert | auto-synchronize | de-assert | normal);

        ignore-all;

        rts (assert | de-assert | normal);

        tm (ignore | normal | require);

    }

    cts-polarity (positive | negative); 

    dcd-polarity (positive | negative); 

    dsr-polarity (positive | negative); 

    dtr-circuit (balanced | unbalanced);

    dtr-polarity (positive | negative);

    encoding (nrz | nrzi);

    loopback (dce-local | dce-remote | liu | local);

    rts-polarity (positive | negative); 

    tm-polarity (positive | negative); 

    transmit-clock invert;

}

This chapter discusses configuration of the following EIA-530 interface properties:

• Configure the EIA-530 Clocking Mode
• Configure the EIA-530 Signal Handling
• Configure the EIA-530 DTR Circuit
• Configure EIA-530 Signal Polarities
• Configure EIA-530 Loopback Capability
• Configure EIA-530 Line Encoding

There are no EIA-530 interface-specific logical properties. For information about general logical properties that you can configure, see Configure Logical Interface Properties.