Nortel Networks 553-3001-211 manual Dialing operations

Page 418 of 894 NT7D16 Data Access card

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).

553-3001-211 Standard 2.00 September 2004