MicroNet Technology SP5001A/S Manuel D’Utilisation

When the VoIP gateway or computer behind the NAT router, normal web surfing and 
email will not know the difference, but some communication services using ports other 
then the normal web ports (ports are like door ways to your computer and for security 
the communication has the abnormal ones closed and locked but the normal ones 
open like the web surfing port 80). It must enable the DMZ (Demilitarized Zone) 
function or setup the Port Forwarding(or called Virtual Server), let the communication 
traffic can pass through the router. 
 

1.  Enter the NAT router configuration by web browser or software utility. 

 

2.  Locate the DMZ function and enable it 

 

SP888B Broadband Router Screen Shot 

 
 

DMZ 
In computer networks, a DMZ (demilitarized zone) is a computer host or small network 
inserted as a "neutral zone" between a company's private network and the outside 
public network. It prevents outside users from getting direct access to a server that has 
company data. (The term comes from the geographic buffer zone that was set up 
between North Korea and South Korea following the UN "police action" in the early 
1950s.) 
 

 

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