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GRP260x Administration Guide
Version 1.0.3.42
one until no response", previous IP will be applied even after DNS timeout
until it cannot respond.
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Default
If the option is set with “default”, it will again try to send register messages to
one IP at a time, and the process repeats.
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Saved one until DNS TTL
If the option is set with “Saved one until DNS TTL”, it will send register
messages to the previously registered IP first. If no response, it will try to
send one at a time for each IP. This behavior lasts if DNS TTL (time-to-live)
is up.
•
Saved one until no responses
If the option is set with “Saved one until no responses”, it will send register
messages to the previously registered IP first, but this behavior will persist
until the registered server does not respond.
Primary IP
Configures the primary IP address where the phone sends DNS query to
when "Use Configured IP" is selected for DNS mode.
Backup IP 1
Configures the backup IP 1 address where the phone sends DNS query to
when "Use Configured IP" is selected for DNS mode.
Backup IP 2
Configures the backup IP 2 address where the phone sends DNS query to
when "Use Configured IP" is selected for DNS mode.
NAT Traversal
Configures whether NAT traversal mechanism is activated. Please refer to
user manual for more details.
If set to “STUN” and STUN server is configured, the phone will route
according to the STUN server. If NAT type is Full Cone, Restricted Cone or
Port-Restricted Cone, the phone will try to use public IP addresses and port
number in all the SIP&SDP messages.
The phone will send empty SDP packet to the SIP server periodically to keep
the NAT port open if it is configured to be “Keep-alive”. Configure this to be
“No” if an outbound proxy is used. “STUN” cannot be used if the detected
NAT is symmetric NAT. Set this to “VPN” if OpenVPN is used.
Support rport (RFC3581)
Configures to use symmetric response routing. If it is used, the "rport" field
will be added to the Via header field in the SIP Request, and the information
will be extracted from the SIP 200OK Response for SIP Register to rewrite
the SIP Contact information and apply it in subsequent SIP Requests.
Proxy-Require
A SIP Extension to notify the SIP server that the phone is behind a
NAT/Firewall.
