Grandstream Networks GXV3140 Application Manual page 44

DNS Mode
NAT Traversal
Proxy Require
Account/SIP Settings
SIP Registration
Unregister On Reboot
Register Expiration (m)
Wait Time Retry
Registration (s)
Local SIP Port
Subscribe for MWI
Session Expiration (s)
MIN-SE (s)
UAC Specify Refresher
Grandstream Networks, Inc.
The default is set to A Record. If the user wishes to locate the server by DNS
SRV, the user may select SRV or NATPTR/SRV.
This setting decides whether the NAT traversal mechanism is activated. If it is set
to "Yes" and STUN server is configured, the GXV3140 will route according the
STUN server.
In this mode, the STUN client embedded in the phone will communicate with the
appointed STUN server to examine which type of Firewall/NAT setting is
employed. If the type of NAT detected is Full Cone, Restricted Cone or
Port-Restricted cone, the phone will try to use public IP addresses and port in all
the SIP and SDP messages.
If the "NAT Traversal(STUN)" is configured to be "No, but keep-alive", the phone
will send an empty SDP packet (without payload data) to the SIP server once in
20 seconds to keep the NAT port open. If an outbound proxy server is used,
please configure this to be "NO".
Notifies the SIP server that the unit is behind a NAT/Firewall.
Selects whether or not the GXV3140 will send a SIP Register message to the
proxy; The default setting is YES.
If set to YES, the SIP user registration messages will be cleared on reboot.
The default setting is YES.
This defines the expiration time of the registration in minutes. The default value
is 50 minutes; the maximum value is 65535 minutes (approximately 45 days)
and the minimum value is 5 minutes.
The wait time for registration retry if registration fails. The default is set to 20
Seconds.
The local SIP port for sending and receiving data. The default settings for
Account 1/2/3 are 5060/5062/5064.
Default is set to No. When selected, a SUBSCRIBE for Message Waiting
Indication will be sent out periodically.
Session Expiration is the time (in seconds) at which the session is considered
timed out if no successful session refresh transaction occurs beforehand. The
default value is 180 seconds.
The minimum session expiration (in seconds). The default value is 90 seconds.
As a Caller, select UAC to use the phone as the refresher, or select UAS to use
the Callee or proxy server as the refresher.
GXV3140 USER MANUAL
FIRMWARE VERSION 1.0.3.10
Page 44 of 117
Updated : 12/2009