This read-only INTEGER holds the encoded network cause value for this specific call, updated whenever the call starts or clears, with its meaning dependent on the interface type and signaling protocol in use. An admin, or automated decoding tooling, reads this per-connection cause code to diagnose why one particular call leg ended, independent of any peer-level cause reporting. For example, a cause code here decoding to 'network congestion' on one connection while sibling connections show normal clearing would point to a transient carrier-side issue affecting just that call attempt.