NT7D16 Data Access card Page 433 of 906Circuit Card Description and InstallationNote: If this feature is active, and the port is connected to a DTE thatholds DTR OFF when idle, the port will be permanently busied out toinbound calls following the DTR timeout period.Inactivity timeoutOnce a successful data call is completed, the user's activity is monitored. Ifno activity occurs within the amount of time configured in the downloadedparameters, the DAC releases the call. Three minutes before the inactivitytimeout takes place, the DAC sends a warning message to the near-endequipment if terminal mode is selected.Wire test modeThe DAC allows for the EIA signaling leads to be tested to facilitateinstallation and troubleshooting. This feature can be invoked through theservice change downloaded parameters, or by setting the appropriate frontpanel switch. Wire test mode only operates when the port is idle. The leadsare cycled ON and OFF in 0.5 second periods (ON for 0.5 seconds, OFF for0.5 seconds) for the number of cycles shown in Table 156 on page 433. Thelead status can be monitored by the front panel LEDs. The test will be runindefinitely until the front panel switch is turned off, and the software wiretest parameters are disabled.Note: For the most accurate results, be sure no equipment is connectedto the EIA leads.Table 156Wire test signal leads cycle countsLabelEIA Signal Leaddescription PinCycle countRS-232-C RS-422TxD Transmit 2 1 1RxD Receive 3 2 2Note: The CTS signal is not included in the faceplate LED. Therefore, a1.5-second delay will occur between the RxD lamp going on, and the DSRlamp going on.
