ZyXEL Communications V300 Betriebsanweisung PDF herunterladen (Seite 41)

V-300 Support Notes

Unable to register with the SIP server?

If you are unable to register with SIP server.

1. Make sure the Internet is reachable and the SIP register server is reachable. If your register server uses

domain name make sure DNS name can be resolved. If you are using static WAN IP make sure DNS server is

configured correctly on your V300.

2. Make sure the SIP account is correct and the password is key in correctly.

3. Check if there is NAT router before it. If there is a NAT router before it, check the NAT traversal method is

configured. V300 support STUN, Outbound Proxy method for the NAT traversal solution.

I can register but can not establish a call?

If you can register to server but can not make a call very likely there is NAT router or firewall before it which is

blocking it. If you have an NAT router before it, please make sure the NAT traversal method is enable. There

are two kinds of NAT traversal method supported in V300. They are STUN and Outbound Proxy.

If the problem is a firewall before it. Please check with the firewall manager, make sure the SIP protocol is

allow to pass-through firewall, and the range of RTP port is allowed through firewall.

I can make a call but the voice only goes one way not bothway?

If you can register to server and I can make a call signal establishment but the voice only goes one way. In this

case it is very likely there are NAT router or firewall before it, please see NAT/firewall related question above.

I can receive a call but the voice only goes one way not bothway?

If you can register to server but can only make out going call but can not receive incoming calls or the incoming

call signal establishment can be made but voice only goes one way very likely there is NAT/firewall router

before it, please see NAT/firewall related question above for tips to troubleshoot.

If all the about have been tried, but register still fail what should I do?

In such case, please contact your local vendor for support. If they can't help out the problem they will escalate

your problem to ZyXEL tech center. To report a problem please prepared below info.

1. Serial number of the device.

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ZyXEL Communications V300 Betriebsanweisung Seite 41