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GXW42xx User Manual
Version 1.0.15.30
Configure the Diff-Serv value for SIP and RTP. Default is:
SIP Diff-Serv 24
RTP Diff-Serv 46
One from the 3 modes available 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 (If selected, please fill in Primary IP, Backup IP 1 and
Backup IP 2.)
One mode can be chosen for the client to look up server.
The default value is “A Record”
DNS SRV Use
Registered IP
If yes, under DNS SRV mode, use Registered IP as INVITE destination instead of
using high priority IP from resolved IP list.
Configures the primary IP address where the phone sends DNS query to when "Use
Configured IP" is selected for DNS mode.
Configures the backup IP 1 address where the phone sends DNS query to when "Use
Configured IP" is selected for DNS mode.
Configures the backup IP 2 address where the phone sends DNS query to when "Use
Configured IP" is selected for DNS mode.
This parameter defines whether the GXW42XX NAT traversal mechanism is activated
or not. If activated (by choosing “STUN”) and a STUN server is also specified, then
the GXW42XX 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
GXW42XX 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 “STUN” with no specified STUN server, the
GXW42XX 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.
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