ACCULINK 3350 E1 NTU4-10 June 1996 3350-A2-GB20-10AlarmsThe E1 NTU can be attached, either locally orremotely, to an ASCII terminal or printer to display orprint alarm messages. The Communications (COM) portcan be used as the destination for Alarm Set and AlarmClear messages. This enables an ASCII terminal or printerto monitor the E1 NTU for alarm conditions. Alarms canalso be displayed on a PC that is using a terminalemulation package.Each alarm message contains a customer identificationto indicate which remote E1 NTU is reporting an alarm.For information about customer identification, refer to theDisplaying Unit Identity section in Chapter 3, Operation.Possible alarm messages are as follows:• Continuous Loss Of Signal detected at the xInterface (where x is either HDSL NetworkLoop 1, HDSL Network Loop 2, or DTE).• Alarm Cleared. Loss of Signal condition at the xInterface (where x is either HDSL NetworkLoop 1, HDSL Network Loop 2, or DTE).• Continuous Out Of Frame condition detected atthe x Interface (where x is either Network orDTE).• Alarm Cleared. Out of Frame condition at the xInterface (where x is either Network or DTE).• Alarm Indication Signal received at the xInterface (where x is either Network or DTE).• Alarm Cleared. Alarm Indication Signal at the xInterface (where x is either Network or DTE).• An Excessive Error Rate has been detected atthe x Interface (where x is either Network orDTE).• Alarm Cleared. An Excessive Error Rate at the xInterface (where x is either Network or DTE).• Remote Alarm Indication signal received at thex Interface (where x is either Network or DTE).• Alarm Cleared. Remote Alarm Indication signalat the x Interface (where x is either Network orDTE).• Loss of Multiframe alignment condition detectedat the x Interface (where x is either Network orDTE).• Alarm Cleared. Loss of Multiframe alignmentcondition at the x Interface (where x is eitherNetwork or DTE).• Remote Multiframe Alarm received at the xInterface (where x is either Network or DTE).• Alarm Cleared. Remote Multiframe Alarm atthe x Interface (where x is either Network orDTE).If two alarm conditions are detected at once, the higherpriority alarm is reported. However, if an even higherpriority alarm is detected before the first alarm is cleared,the later alarm is not reported. (The alarms listed aboveare in priority order with the highest priority listed first.)Alarms remain active until the alarm condition iscleared. Also, an alarm clear message is only sent whenthere are no other alarms active.For information about alarm configuration options,refer to the Alarm Configuration Options section inAppendix C, Configuration Options.For troubleshooting information, refer to theTroubleshooting section on page 4-12.