MyPBX U300 Administrator Guide
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before considering the register has timed out. The default is 20
seconds.
Calling Channel
Codec Priority
Once enabled, when dialing out via SIP/SPS trunks, the codec of
calling channel will be selected in preference. If not, MyPBX will
follow the priority in your SIP/SPS trunks.
Video Support
Support for SIP video or no. The default is yes.
Max Bit Rate
Configure the max bit rate for video stream. The default: 384kb/s.
DNS SRV Look Up
Please enable this option when your SIP trunk contains more
than one IP address.
User Agent
To change the user agent parameter of asterisk, the default
is
“MyPBX”; you could change it if needed.
2) NAT Settings
Configuration of this section is only required when you use remote extensions.
Table 17-2 SIP Settings- NAT
NAT Settings
Enable STUN
Whether to enable STUN.
STUN Address
STUN IP address.
STUN Port
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 be 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