256-KBPS LINE DRIVER (V.35, RS-530, OR X.21)
Table 5-2. The indicators.
The item numbers in this table correspond to Figures 5-1 and 5-2.
ITEM | INDICATOR | FUNCTION |
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1 | PWR | Green LED is on when power is on. |
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2 | RTS | Yellow LED is on when terminal activates Request to Send. |
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3 | TD | Yellow LED is on when steady SPACE is being transmitted. It flickers |
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| when data is transmitted. |
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4 | RD | Yellow LED is on when steady SPACE is being received. It flickers |
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| when data is received. |
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5 | DCD | Yellow LED is on when a valid receive signal is present. |
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6 | TEST | Red LED is on when the |
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7 | ERR | LED goes ON when PATT switch is activated and then dims. If there are |
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| errors in the test pattern, the LED blinks or remains ON. |
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5.2 Operating Procedure
The line driver operates entirely unattended, although we recommend that you monitor its LEDs occasionally. To turn the unit off, you must unplug its power cord from the
If you want to reconfigure the line driver for a different type of operation, make very sure to unplug the unit first. After the unit is powered down, change the settings of its internal controls as necessary, following the instructions in Section 3.3.
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