
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).
Summary of Contents for Circuit Card
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Page 4: ...Page 4 of 906 Revision history 553 3001 211 Standard 3 00 August 2005...
Page 18: ...Page 18 of 906 Contents 553 3001 211 Standard 3 00 August 2005...
Page 78: ...Page 78 of 906 Overview 553 3001 211 Standard 3 00 August 2005...
Page 100: ...Page 100 of 906 Acceptance tests 553 3001 211 Standard 3 00 August 2005...
Page 156: ...Page 156 of 906 Option settings 553 3001 211 Standard 3 00 August 2005...
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