Nortel Networks 553-3001-211 manual Inactivity timeout, Wire test mode

NT7D16 Data Access card Page 421 of 894

Note: If this feature is active, and the port is connected to a DTE that holds DTR OFF when idle, the port will be permanently busied out to inbound calls following the DTR timeout period.

Inactivity timeout

Once a successful data call is completed, the user's activity is monitored. If no activity occurs within the amount of time configured in the downloaded parameters, the DAC releases the call. Three minutes before the inactivity timeout takes place, the DAC sends a warning message to the near-end equipment if terminal mode is selected.

Wire test mode

The DAC allows for the EIA signaling leads to be tested to facilitate installation and troubleshooting. This feature can be invoked through the service change downloaded parameters, or by setting the appropriate front panel switch. Wire test mode only operates when the port is idle. The leads are cycled ON and OFF in 0.5 second periods (ON for 0.5 seconds, OFF for

0.5seconds) for the number of cycles shown in Table 151 on page 421. The lead status can be monitored by the front panel LEDs. The test will be run indefinitely until the front panel switch is turned off, and the software wire test parameters are disabled.

Note: For the most accurate results, be sure no equipment is connected to the EIA leads.

Table 151

Wire test signal leads cycle counts

			Cycle count
	EIA Signal Lead
Label	description	Pin	RS-232-C	RS-422
TxD	Transmit	2	1	1
RxD	Receive	3	2	2

Note: The CTS signal is not included in the faceplate LED. Therefore, a 1.5-second delay will occur between the RxD lamp going on, and the DSR lamp going on.

Circuit Card Description and Installation