Yeastar Technology MyPBX-SOHO, Руководство администратора, Страница: 112 / 204

MyPBX SOHO Administrator Guide
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·STUN Address
The STUN server allows clients to find out their public address, the type of NAT they are
behind and the Internet side port associated by the NAT with a particular local port. This
information is used to set up UDP communication between the client and the VoIP
provider and so establish a call.
·External IP Address
The IP address that will be associated with outbound SIP messages if the system is in a
NAT environment.
·External Host
Alternatively you can specify an external host, and the system will perform DNS queries
periodically.
This setting is only required when your public IP address is not static. It is recommended
that a static public IP address is used with this system. Please contact your ISP for more
information.
·External Refresh Interval
If an external host has been supplied, you may specify how often the system will perform
a DNS query on this host. This value is specified in seconds.
·Local Network Identification
Used to identify the local network using a network number/subnet mask pair when the
system is behind a NAT or firewall.
Some examples of this are as follows:
“192.168.0.0/255.255.0.0”: All RFC 1918 addresses are local networks;
“10.0.0.0/255.0.0.0”: Also RFC1918;
“172.16.0.0/12”:Another RFC1918 with CIDR notation;
“169.254.0.0/255.255.0.0”: Zero conf local network.
Please refer to RFC1918 for more information.
·NAT Mode
Global NAT configuration for the system; the options for this setting are as follows:
Yes = Use NAT. Ignore address information in the SIP/SDP headers and reply to the
sender's IP address/port.
No = Use NAT mode only according to RFC3581.
Never = Never attempt NAT mode or RFC3581 support.
Route = Use NAT but do not include rport in headers.
·Allow RTP Reinvite
By default, the system will route media steams from SIP endpoints through itself. Enabling
this option causes the system to attempt to negotiate the endpoints to route packets to