Nortel-networks Circuit Card Manual de usuario Pagina 430

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Page 430 of 906 NT7D16 Data Access card
553-3001-211 Standard 3.00 August 2005
Port mode
This lamp lights to indicate that the port indicated is in RS-422 mode. If the
lamp is dark, the specified port is in RS-232-C mode.
Port number
The number displayed specifies the port driving the EIA signal LEDs
mentioned above. The push-button switch below the display allows you to
rotate among the six ports to monitor the activity of any port. This display is
also used to monitor several error conditions.
Port select button
This push-button switch below the display is used to select which port is
monitored.
Wire test
These switches are used to select the wire test mode for each of the six ports.
Dialing operations
The DAC supports both keyboard and Hayes dialing sequences. The
following discussion concerns features common to both dialing modes.
Port firmware in idle state
The port firmware is considered idle when it is expecting one of the allowed
autobaud characters. The idle state is identified by either of the following
conditions:
The last prompt received was RELEASED (keyboard dialing).
The last prompt received was OK, NO CARRIER, or ERROR (Hayes
dialing).
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