We have found that routers are the most common cause of VoIP service
disruptions. Most modern routers provide you with the ability to open
certain ports in the router and firewall so that communication can pass
freely to and from your telephone adapter. If you still experience call
quality issues after opening the following ports, then go to the second
option of putting your adapter in the DMZ.
Outbound Ports to Open: 5060-5070,8060-8070
Traffic Type: UDP
Incoming Firewall Ports to Open: 10000-30000
Traffic Type: UDP
The second option:
Activating the DMZ option eliminates the router as a problem source
while still offering the same level of security and networking options
to all the other devices within your network. DMZ also allows our
technical support department to access your phone adapter for remote
troubleshooting purposes.
DMZ is an acronym for
"De-Militarized Zone". Enabling this feature tells your router to
deliver all incoming traffic in an un-altered form to the device that
you specify. In this case the device will be your VoIP telephone
adapter. This elimates the router as the source of your VoIP problems.
Every brand of router
has a different management interface. Please refer to your router
manual or contact our technical support department.
Once you know the IP
enter it in the DMZ section of your router. Be sure to enable the
feature and save the settings. This change is immediate so you will be
able to test your VoIP telephone right away to find the results.
Article ID: 68, Created: 2/6/2014 at 10:29 PM, Modified: 2/6/2014 at 10:29 PM