Yeastar Technology TA3210, Руководство пользователя

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TA3210 User Manual
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Table 4-5 Description of SIP NAT Settings
Item Description
Enable
STUN
STUN (Simple Traversal of UDP through NATs) is a protocol for
assisting devices behind a NAT firewall or router with their packet
routing.
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.
STUN Port The STUN port.
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
Re-invite
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 each other directly,
bypassing the system. It is not always possible for the system to
negotiate endpoint-to-endpoint media routing.