User's Manual
FIRMWARE VERSION 1.0.1.14      GXP2130/GXP2140/GXP2160 USER MANUAL   Page 60 of 84 
Always Ring Speaker 
Configures to enable or disable the speaker to ring when headset is used 
on "Toggle Headset/Speaker" mode. If set to "Yes", when the phone is in 
Headset "Toggle Headset/Speaker" mode, both headset and speaker will 
ring on incoming call. The default setting is "No". 
Headset TX gain 
Configures the transmission gain of the headset. The default value is 
0dB. 
Headset RX gain 
Configures the receiving gain of the headset. The default value is 0dB. 
Handset TX gain 
Configures the transmission gain of the handset. The default value is 0 
dB. 
Settings -> LCD Display 
Backlight Brightness: Active 
Configures the LCD brightness when the phone is active. Valid range is 
10 to 100 where 100 is the brightest. Default value is 70. 
Backlight Brightness: Idle 
Configures the LCD brightness when the phone is idle. Valid range is 10 
to 100 where 0 is off and 100 is the brightest. Default value is 30. 
Disable Missed Call Backlight 
Configures the backlight to be on or off when there is missed call. 
Settings -> Date and Time 
NTP Server 
Defines the URL or IP address of the NTP server. The phone may obtain 
the date and time from the server. 
Allow DHCP Option 42 
Override NTP Server 
Defines  whether DHCP  Option  42  should  override  NTP  server  or  not. 
When enabled, DHCP Option 42 will override the NTP server if it's set up 
on the LAN. The default setting is "Yes". 
Time Zone 
Configures the date/time used on the phone according to the specified 
time zone. 
Self-Defined Time Zone 
This parameter allows the users to define their own time zone.   
The syntax is: std offset dst [offset], start [/time], end [/time]   
Default is set to: MTZ+6MDT+5,M4.1.0,M11.1.0   
MTZ+6MDT+5 
This indicates a time zone with 6 hours offset with 1 hour ahead (when 
daylight saving) which is U.S central time. If it is positive (+) if the local 
time  zone  is  west  of  the  Prime  Meridian  (A.K.A:  International  or 
Greenwich Meridian) and negative (-) if it is east.   
M4.1.0,M11.1.0   
The 1st number indicates Month: 1,2,3.., 12 (for Jan, Feb, .., Dec)   
The 2nd number indicates the nth iteration of the weekday: (1st Sunday, 
3
rd
 Tuesday…)   
The  3rd  number  indicates  weekday:  0,1,2,..,6(  for  Sun,  Mon, 










