Advise callers to make sure the ISP (Internet Service Provider) does not have these ports blocked. If  the customer is experiencing issues connecting to these ports have the ISP add them as an exception to the firewall. 

8582 (Firmware Updates),

9120 (BroadPOS) url is t.broadpos.com

9080 (PAXSTORE) url t.paxstore.us      

5003 (Tsys Port),

443 (Standard Port)