User Guide
Grandstream Networks, Inc.  GXP User Manual  Page 35 of 44 
       Firmware 1.2.5.3     Last Updated: 03/2011 
NTP server 
This parameter defines the URI or IP address of the NTP (Network Time 
Protocol) serve. It is used to display the current date/time. 
Public Mode 
Default is ‘No’ (standard mode). Supported only on GXP1200, GXP2010, and 
GXP2020. This feature is de
signed specifically to support the Call Queue 
feature implemented on Grandstream’s GXE5024 or GXE5028. If set to ‘Yes’, 
this feature will allow other call queue agents to login/logout using their own 
login name and password  on the same phone.  When enabled
, all other 
accounts will not be active. 
Distinctive Ring Tone 
Caller ID must be configured. Select a Distinctive Ring Tone 1 through 3 for a 
particular Caller ID. The GXP will ONLY use selected ring tones for particular 
Caller IDs. For all other calls
, the GXP will use System Ring Tone. When 
selected and no Caller ID is configured, the selected ring tone will be used for all 
incoming calls. 
System Ring Tone 
System ring tone. Default is North American standard.  
Adjust system ring tone frequencies and cadences based on local telecom 
standard. 
Call Progress Tones 
Using these settings, users can configure ring or tone frequencies based on 
parameters from local telecom. By default, they are set to North American 
standard. 
Frequencies should be configured with known values to avoid uncomfortable 
high pitch sounds.  
Syntax: f1=val,f2=val[,c=on1/off1[-on2/off2[-on3/off3]]];  
(Frequencies are in Hz and cadence on and off are in 10ms)  
ON is the period of ringing (“On time” in ‘ms’) while OFF is the period of silence. 
In order to set a continuous ring, OFF should be zero. Otherwise it will ring ON 
ms and a pause of OFF ms and then repeat the pattern. Up to three cadences 
are supported.  
Intercom User ID: 
This field is used to configure the Intercom key in the phone. For GXP2010 and 
GXP2020 only 
If the phone is working with a GS GXE502X IP-PBX it can be configured in the 
following manner: 
•  To page an extension : [intercom feature code]+[*]+[extension number] 
•
  To page a group : [paging group feature code]+[*]+[group extension] 
Disable Call Waiting 
Default is No. If set to Yes, the call waiting feature will be disabled. 
Disable Call 
Waiting Tone 
Default is No. If set to Yes, the call waiting tone will be disabled. 
Disable Direct IP Calls 
Default is No. If set to Yes, direct IP calls will be disabled 










