Transient error on a CCS trunk affecting a single channel

This section describes the sequence of events involved when there is a transient error on a CCS trunk affecting a single channel.

Figure 1 shows the following events:

Figure 1. Transient error on a CCS trunk affecting a single channel
The graphic is a very simplified representation of the process described in detail in the next section.
  1. A trunk is enabled, and there are active calls on the trunk.
  2. The signaling process detects a network condition that means that a single channel on the trunk is temporarily unavailable for use. Or, the signaling process detects a transient internal error that affects a single channel.
  3. The signaling process logs an error using CA_LOG_ERROR().
  4. The signaling process places the channel in the alarm state by sending the SL_CHANNEL_ALARM_IND primitive with fAlarm set to TRUE.
  5. The channel is now alarmed.
  6. When the signaling process detects that the alarm condition has passed, it removes the channel from the alarm state by sending SL_CHANNEL_ALARM_IND with fAlarm set to FALSE.
Parent topic: Example signaling flows