Yeastar Technology NeoGate User Manual page 44

Register Attempts
Register Timeout
Calling Channel Codec
Priority
Video Support
Max Bit Rate
DNS SRV Look Up
User Agent
2) NAT
Note: Configuration of this section is required when using remote extensions generally.
Items
Enable STUN
STUN Address
External IP
Address
External Host
http://www.yeastar.com
The number of SIP REGISTER messages to send to a
SIP Registrar before giving up. Default is 0 (no limit)
Number of seconds to wait for a response from a SIP
Registrar before timed out. Default is 20 seconds.
Once enabled, when dialing out via SIP/SPS trunks, the
codec of calling channel will be selected in preference.
If not, NeoGate TG will follow the priority in your
SIP/SPS trunks.
Support for SIP video or no. Default is yes.
Configure the max bit rate for video stream. The
default: 384kb/s
Please enable this option when your SIP trunk contains
more than one IP address.
To change the user agent parameter of asterisk, the
default is "NeoGate TG", you can change it if needed.
Figure 7-21
Description
STUN (Simple Traversal of UDP through NATs) is a protocol for
assisting devices behind a NAT firewall or router with their
packet routing.
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.
The IP address that will be associated with outbound SIP
messages if the system is in a NAT environment.
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
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