public void setLimitCallDuration(int limitCallDurationSeconds) {
		for (Setting item : settings) {
			if (item instanceof SetLimitCallDurationSetting) {
				settings.remove(item);
				break;
			}
		}
		SetLimitCallDurationSetting limitCallSetting = new SetLimitCallDurationSetting(
				limitCallDurationSeconds);
		settings.add(limitCallSetting);
	}