iAG801 Series Analog Gateway User Manual
35
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Network Change
Event
Through the use of the "test_stun_monitor" module, the gateway has the ability to
detect when the perceived external network address has changed. When the
"stun_monitor" is installed and configured, "chan_sip" will renew all outbound
registrations when the monitor detects any sort of network change has occurred.
By default this option is enabled, but only takes effect once "res_stun_monitor" is
configured. If "res_stun_monitor" is enabled and you wish to not generate all
outbound registrations on a network change, use the option below to disable this
feature.
Match External
Address Locally
Only substitute the external address or domain name if it matches.
Dynamic and
Static Selection
Dynamic hosts are not allowed to register with the IP address of static hosts. This
will avoid registration errors with the same IP.
External TCP Port
Mapping
When the gateway is behind a static NAT or PAT, the TCP port is externally mapped.
External IP
Address
The external address of the NAT (and optional TCP port).
External IP Address = hostname[:port] specifies a static address[:port] to be used
in SIP and SDP messages.
Examples:
External IP Address = 12.34.56.78
External IP Address = 12.34.56.78:9900
External IP
Hostname
The external hostname (and optional TCP port) of the NAT.
Hostname Refresh
Interval
It will show how often to perform the hostname lookup. You can also configure a
domain name. The gateway will perform a DNS query (This method is not
recommended). Try to use IP and configure "externip".
