public Vector<TsapiCallMonitor> getCallObservers() {
		Vector<TsapiCallMonitor> allObservers = getObservers();
		synchronized (this.callbackAndTypeVector) {
			CallbackAndType cbAndType = null;
			for (int i = 0; i < this.callbackAndTypeVector.size(); i++) {
				cbAndType = (CallbackAndType) this.callbackAndTypeVector
						.elementAt(i);
				TsapiCallMonitor obs = cbAndType.callback;
				if (!allObservers.contains(obs)) {
					allObservers.addElement(obs);
				}
			}
		}
		return allObservers;
	}