Grandstream GXP21xx Series User Manual - Manual (Page 60)

FIRMWARE VERSION 1.0.8.4 GXP2120/GXP2110/GXP2100/GXP14xx USER MANUAL Page 58 of 85
Keep-alive Interval
Specifies how often the phone sends a blank UDP packet to the SIP
server in order to keep the "ping hole" on the NAT router to open. The
default setting is 20 seconds.
Use NAT IP
The NAT IP address used in SIP/SDP messages. This field is blank at
the default settings. It should ONLY be used if it's required by your ITSP.
STUN Server
The IP address or Domain name of the STUN server. STUN resolution
results are displayed in the STATUS page of the Web GUI. Only
non-symmetric NAT routers work with STUN.
Public Mode
Configures to turn on/off public mode for hot desking feature on the
phone. If set to "Yes", users would need fill in the SIP Server address for
account 1 as well. Then reboot the phone. When the phone boots up,
users will need enter SIP User ID and Password on the LCD to login and
use the phone.
Note:
When the phone is in public mode login screen, press CONF button will
have the IP address of the phone displayed.
Public Mode Login Expiration
Expiration time is 0 to 24 hours. After time expiration, phone will auto log
out.
Settings -> Call Features
Off-hook Auto Dial
Configures a User ID/extension to dial automatically when the phone is
off hook. The phone will use the first account to dial out. The default
setting is "No".
Off-hook Timeout
If configured, when the phone is on hook, it will go off hook after the
timeout (in seconds). The default value is 30 seconds.
Intercom User ID
Configures the intercom extension number for account 1 to dial out (Not
applicable to GXP14xx). This User ID is mapped to the INTERCOM
button on the phone.
Disable Call Waiting Disables the call waiting feature. The default setting is "No".
Disable Call Waiting Tone
Disables the call waiting tone when call waiting is on. The default setting
is "No".
Disable Direct IP Call Disables Direct IP Call. The default setting is "No".
Use Quick IP Call mode
When set to "Yes", users can dial an IP address under the same
LAN/VPN segment by entering the last octet in the IP address. To dial
quick IP call, off hook the phone and dial #XXX (X is 0-9 and XXX
<=255), phone will make direct IP call to aaa.bbb.ccc.XXX where
aaa.bbb.ccc comes from the local IP address REGARDLESS of subnet