/// <summary>
        /// is Pos Allowed
        /// </summary>
        /// <param name="posId">POS id</param>
        /// <returns></returns>
        private bool IsPosAllowed(byte posId)
        {
            var dateStart = DateTime.Now;

            Performancelog.Debug($"Start,LoginManager,IsPosAllowed,{string.Empty},{DateTime.Now:hh.mm.ss.ffffff}");
            var returnValue = false;
            var security    = _policyManager.LoadSecurityInfo();

            if (_utilityService.GetDistinctIpAddress(posId) < security.MaxConcurrentPOS)
            {
                returnValue = true;
            }
            Performancelog.Debug($"End,LoginManager,IsPosAllowed,{DateTime.Now.Subtract(dateStart).TotalMilliseconds},{DateTime.Now:hh.mm.ss.ffffff}");
            return(returnValue);
        }