Grandstream GXW400x User Manual - Manual (Page 46)

FIRMWARE VERSION 1.0.14.1 GXW400X USER MANUAL Page 44 of 60
NAT Traversal This parameter defines whether the GXW400X NAT traversal mechanism is activated or
not. If activated (by choosing “Yes”) and a STUN server is also specified, then the
GXW400X performs according to the STUN client specification. Under this mode, the
embedded STUN client will detect if and what type of firewall/NAT is being used. If the
detected NAT is a Full Cone, Restricted Cone, or a Port-Restricted Cone, the GXW400X
will use its mapped public IP address and port in all of its SIP and SDP messages.
If the NAT Traversal field is set to “Yes” with no specified STUN server, the GXW400X
will periodically (every 20 seconds) send a blank UDP packet (with no payload data) to
the SIP server to keep the “hole” on the NAT open.
DNS Mode One from the 3 modes are av ailable for “DNS Mode” configuration:
-A Record (for resolving IP Address of target according to domain name)
-SRV (DNS SRV resource records indicates how to find services for various protocols)
-NAPTR/SRV (Naming Authority Pointer according to RFC 2915)
-Use Configured IP (Use the three configured IP address instead of any DNS query)
One mode can be chosen for the client to look up server.
The default value is “A Record”
Primary IP Configure the primary IP for DNS Mode: Use Configured IP
Backup IP1 Configure the first backup IP for DNS Mode: Use Configured IP
Backup IP2 Configure the second backup IP for DNS Mode: Use Configured IP
Tel URI The default setting is “Disabled”. If the phone has an assigned PSTN
Number, this field should be set to “User=Phone” then a
“User=Phone” parameter will be attached to the “From header” in the SIP
request to indicate the E.164 number. If server supports TEL URI format, then this option
needs to be selected.
Use Request Routing
ID in SIP INVITE
Header
If set to Yes, device will use Request URI Routing ID defined in FXS ports settings to
replace From and Contact headers for outgoing calls.
SIP Registration This parameter controls whether the GXW400X needs to send REGISTER messages to
the proxy server. The default setting is “Yes”.
Unregister on Reboot Default is No . If set to “Yes”, the SIP user’s registration information is cleared on reboot.