1.11.1. Alarm Handling for DM3 Boards

When using DM3 boards, alarms are recognized on a span basis. Once an alarm is detected, all open channels on that span receive a GCEV_BLOCKED event. When the alarm is cleared, open channels receive a GCEV_UNBLOCKED event. Alarm notification only occurs on the first alarm on and the last alarm off.

The gc_SetEvtMsk( ) function can be used to mask events on a line device. Using the gc_SetEvtMsk( ) function on a line device for a time slot sets the mask for the specified time slot only and does not apply to all time slots on the same trunk as is the case when using Springware boards.

The set of Global Call functions that comprise the GCAMS interface for alarm management are supported with the following restrictions:

• Using GCAMS, the application has the ability to set which alarms are blocking and non-blocking as described in the Global Call API Programming Guide. However, this capability applies on a span basis only. Changing which alarms are blocking and non-blocking for one timeslot results in changing which alarms are blocking and non-blocking for all time slots on the span.
• For ISDN on T-1 technology, the following is a list of the alarms that can be transmitted:
  • YELLOW
  • BLUE
• For ISDN on E-1 technology, the following is a list of the alarms that can be transmitted:
  • Remote alarm - DEA_REMOTE
  • Unframed all 1's alarm - DEA_UNFRAMED1
  • Signaling all 1's alarm - DEA_SIGNALALL1
  • Distant multi-framed alarm - DEA_DISTANTMF
• Using the gc_GetAlarmParm( ) and gc_SetAlarmParm( ) functions to retrieve and set specific alarm parameters, for example alarm triggers, is not supported.

The following list shows the alarms that are supported for ISDN on E-1 for DM3 boards. The dagger symbol () next to an alarm name indicates that the alarm is blocking by default. The default can be changed using gc_SetAlarmConfiguration( ).

• DTE1_CRC_CFA - Time slot 16 CRC failure
• DTE1_CRC_CFAOK - Time slot 16 CRC failure recovered
• DTE1_DCHAN_CFA - D channel out of service
• DTE1_DCHAN_CFAOK - D channel out of service recovered
• DTE1_FSERR - Received frame sync error
• DTE1_FSERROK - Received frame sync error recovered
• DTE1_LOOPBACK_CFA - Diagnostic mode on the line trunk
• DTE1_LOOPBACK_CFAOK - Diagnostic mode on the line trunk recovered
• DTE1_LOS - Received loss of signal
• DTE1_LOSOK - Received loss of signal recovered
• DTE1_MFSERR - Received multi-frame sync error
• DTE1_MFSERROK - Received multi-frame sync error recovered
• DTE1_RDMA - Received distant multi-frame alarm
• DTE1_RDMAOK - Received distant multi-frame alarm recovered
• DTE1_RED - Received red alarm
• DTE1_REDOK - Received red alarm recovered
• DTE1_RLOS - Received loss of sync
• DTE1_RLOSOK - Received loss of sync recovered
• DTE1_RRA - Received remote alarm
• DTE1_RRAOK - Received remote alarm recovered
• DTE1_RSA1 - Received signaling all 1's
• DTE1_RSA1OK - Received signaling all 1's recovered
• DTE1_RUA1 - Received unframed all 1's
• DTE1_RUA1OK - Received unframed all 1's recovered

The following list shows the alarms that are supported for ISDN on T-1 for DM3 boards. The dagger symbol () next to an alarm name indicates that the alarm is blocking by default. The default can be changed using gc_SetAlarmConfiguration( ).

• DTT1_DCHAN_CFA - D channel out of service
• DTT1_DCHAN_CFAOK - D channel out of service recovered
• DTT1_LOOPBACK_CFA - Diagnostic mode on the line trunk
• DTT1_LOOPBACK_CFAOK - Diagnostic mode on the line trunk recovered
• DTT1_LOS - Initial loss of signal detected
• DTT1_LOSOK - Signal restored
• DTT1_RBL - Received blue alarm
• DTT1_RBLOK - Received blue alarm restored
• DTT1_RCL - Received carrier loss
• DTT1_RCLOK - Received carrier loss restored
• DTT1_RED - Received a red alarm condition
• DTT1_REDOK - Red alarm condition recovered
• DTT1_RLOS - Received loss of sync
• DTT1_RLOSOK - Received loss of sync restored
• DTT1_RYEL - Received yellow alarm
• DTT1_RYELOK - Received yellow alarm restored

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