IP Phone User Manual
Grandstream Networks, Inc.  GXP1400/1405 User Manual   Page 22 of 36 
   Firmware version: 1.0.1.83  Last Updated: 08/2011 
HEADSET Key Mode 
Default Mode: 
-  Toggle to Headset when using Speaker/Handset 
-  Dial, pick up call or hang up call using Headset 
Toggle Headset/Speaker:  
-  toggle between using Headset and using Speaker 
Headset TX gain (dB) 
Set headset TX gain to -6, 0 or +6. Default is 0 db. 
Headset RX gain (dB) 
Set headset RX gain to -6, 0 or +6. Default is 0 db. 
Table 15:  Device Configuration – Settings /Advanced Settings 
Admin  
Password 
Administrator password. Only the administrator can access the “Advanced Settings” 
and “Account Settings” page. Password field is purposely blank for security reasons 
after clicking update and saved. The maximum password length is 25 characters. 
Layer 3 QoS 
This field defines the layer 3 QoS parameter. It is the value used for IP Precedence 
or Diff-Serv or MPLS. Default value is 12. 
Layer 2 QoS 
This contains the value used for layer 2 802.1Q/VLAN tag and 802.1p priority value. 
Default setting is 0. 
Local RTP port 
This parameter defines the local RTP port pair used to listen and transmit. It is the 
base RTP port for channel 0. When configured, channel 0 will use this port _value 
for RTP; channel 1 will use port_value+2 for RTP. Local RTP port ranges from 1024
to 65400 and must be even. The default value is 5004. 
Use Random Port 
This parameter, when set to “Yes”, will force random generation of both the local 
SIP and RTP ports. This is usually necessary when multiple GXP
s are behind the 
same NAT. Default is “No”. 
Keep-alive interval 
This parameter specifies how often the GXP1400/1405 sends a blank UDP packet 
to the SIP server in order to keep the “hole” on the NAT open. Default is 20 
seconds. 
Use NAT IP 
NAT IP address used in SIP/SDP message. Default is blank. 
STUN Server 
IP address or Domain name of the STUN server. STUN resolution result will display 
in the STATUS page of the Web UI. 
Firmware Upgrade and 
Provisioning 
Allows the user to select the following options for firmware upgrade:  
•  Always Check for New Firmware 
•  Check New Firmware only when F/W pre/suffix changes 
•  Always Skip the Firmware Check.  
Firmware upgrade may take up to 10 minutes depending on network environment. 
Do not interrupt the firmware upgrading process. 
Note: Grandstream strongly recommends that the user upgrade firmware 
locally in 
a LAN environment if using TFTP to upgrade. Please DO  NOT 
interrupt the 
upgrade process (especially the power supply) as this will damage the device. 










