void staleObsCleanup(int cause) {
		synchronized (this.staleObsVector) {
			for (int i = 0; i < this.staleObsVector.size(); i++) {
				((TsapiCallMonitor) this.staleObsVector.elementAt(i))
						.deleteReference(this, false, cause, null);
			}

			this.staleObsVector.removeAllElements();
		}
	}