user manual
Grandstream Networks, Inc.  GXP21xx User Manual  Page 31 of 41 
                 Firmware version: 1.0.1.66         Last Updated: 05/2011 
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 
Configure intercom user ID when intercom is used. 
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. 
Use Quick IP Call Mode 
Dial an IP address under the same LAN/VPN segment by entering the last octet in 
the IP address. 
In the Advanced Settings page there is an option “Use Quick IP-call mode”. 
Default 
setting is “No”. When set to “Yes”, and #XXX is dialed, where 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 mask. 
#XX or #X are also valid so leading 0 is not required (but OK). See 
Quick IP Call 
Mode for details.  
Disable Conference 
Default is “No”. If set to “Yes”, conference will be disabled. 
Enable MPK Sending 
DTMF 
Default is No. If set to “Yes”, Muti-Purpose keys can be sent as DTMF.  
Disable DND Button 
Default is “No”. If set to “Yes”, the “DND” button on keypad will be disabled.  
Disable Transfer 
Default is “No”. If set to “Yes”, transfer will be disabled. 
Auto-Attended Transfer 
Default is “No”. If set to “Yes”, the phone will use attended transfer by default. 
Configuration via 
Keypad Menu 
Configures the access control of configurations via the phone keypad menu. There 
are three modes:  
•  Unrestricted 
•  Basic Settings Only 
•
  Constraint Mode 










