User's Manual Part 1
Grandstream Networks, Inc. GXV3175 USER MANUAL    Page 30 of 68 
    FIRMWARE VERSION 1.0.0.32 Updated : 11/2010 
CALL FEATURES 
These are the feature codes for call features. To use the code, select the line you wish to use by pressing 
the LINE button and enter the feature code. 
Table 6: Call Features 
Code  Feature 
*01  Select the preferred video/audio codec used for the call. Dial *01 + codec feature code + 
Phone/Ext. Number (See Table 8 for codec feature code) 
*02  Force the video/audio codec used for the call. Dial *02 + codec feature code + Phone/Ext. 
Number (See Table 8 for codec feature code) 
*30  Block Caller ID (for all subsequent calls) 
*31  Send Caller ID (for all subsequent calls) 
*50  Disable Call waiting (for all subsequent calls) 
*51  Enable Call Waiting (for all subsequent calls) 
*67  Block Caller ID (per call): Dial *67 + Phone/Ext. Number (no dial-tone in between). 
*82  Send Caller ID (per call): Dial *82 + Phone/Ext. Number (no dial-tone in between). 
*83  Send audio only: Dial *83 + Phone/Ext. Number (no dial-tone in between) 
*84  Send audio and video: Dial *84 + Phone/Ext. Number (no dial-tone in between) 
*70  Disable Call Waiting (per call): Dial *70 + Phone/Ext. Number (no dial-tone in between). 
*71  Enable Call Waiting (per call): Dial *71 + Phone/Ext. Number (no dial-tone in between). 
*72  Unconditional Call Forward: Dial *72 + Phone/Ext. Number followed by the # key. Wait for a 
dial-tone and then hang up (dial-tone means input is successful). 
*73  Cancel Unconditional Call Forward: Dial *73 and wait for a dial-tone before hanging up. 
*90  Busy Call Forward: Dial *90 + Phone/Ext. Number followed by the # key. Wait for a dial- tone 
and then hang up. 
*91  Cancel Busy Call Forward: dial *91 and wait for a dial-tone before hanging up. 
*92  Delayed Call Forward: Dial *92 + Phone/Ext. Number followed by the # key. Wait for a dial-
tone and then hang up. 
*93  Cancel Delayed Call Forward: Dial *93 and wait for a dial-tone before hanging up. 
Table 7: GXV3140 Audio/Video Codec Feature Code 
Codec  Feature Code 
PCMU  7110 
PCMA  7111 
G723  723 
G726-32  72632 
G729  729 
G722  722 
GSM  7200 
L16-256  7202 
H.264  264 
H.263  263 










