This section describes the sequence of events involved when there is an
unrecoverable error on a CCS trunk when the entire trunk affected.
Figure 1. Unrecoverable error on a CCS trunk affecting the entire
trunk
![The graphic is a very simplified representation of the process described in detail in the next section.](./ueccsent.gif)
- A trunk is enabled, and there are active calls on the trunk.
- The signaling process detects any internal error that affects the whole
trunk. (For example, corruption of an internal data structure.)
- The signaling process clears all active calls to the network if possible.
- The signaling process clears all calls to Blueworx Voice Response by sending the SL_CALL_TERMINATE_IND primitive.
- The signaling process logs an error using CA_LOG_ERROR().
- The signaling process disables the trunk by sending the SL_TRUNK_DISABLE_IND primitive.
- The trunk is now disabled.
- If the system manager re-enables the trunk using SL_TRUNK_ENABLE_REQ the signaling process should re-initialize its internal structures.