Grandstream GXV3140 User Manual User Manual

Page 49

FIRMWARE VERSION 1.0.7.80 GXV3140 USER MANUAL

Page 49 of 151

penetration in different network environments. If a symmetric NAT is

detected, STUN will not work and ONLY an Outbound Proxy will work.

Secondary Outbound Proxy IP address or domain name of a backup Outbound Proxy.

DNS Mode

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.

NAT Traversal

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”.

Proxy Require

Notifies the SIP server that the unit is behind a NAT/Firewall.

Account/SIP Settings

SIP Registration

Selects whether or not the GXV3140 will send a SIP Register message to

the proxy; The default setting is YES.

Unregister On Reboot

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.

Wait Time Retry

Registration (s)

The wait time for registration retry if registration fails. The default is set to

20 Seconds.

Local SIP Port

The local SIP port for sending and receiving data. The default settings for

Account 1/2/3 are 5060/5062/5064.

Subscribe for MWI

Default is set to No. When selected, a SUBSCRIBE for Message Waiting

Indication will be sent out periodically.

Session Expiration (s)

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.

MIN-SE (s)

The minimum session expiration (in seconds). The default value is 90