User's Manual
Table Of Contents
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GXW42xx User Manual 
Version 1.0.5.43 
Enter a STUN Server IP (or FQDN) that you may have, or look up a free public STUN Server on the 
internet and enter it on this field. If using Public IP, keep this field blank. 
2.  NAT Traversal (under the Profile web pages) 
Set this to Yes when gateway is behind firewall on a private network. 
DTMF Methods 
DTMF Settings are in Profile pages. 
•  DTMF in-audio 
•  DTMF via RTP (RFC2833) 
•  DTMF via SIP INFO 
You can enable set priority of DTMF methods according to your preference, from Priority 1 to 3. This setting 
should be based on your server DTMF setting. 
Preferred Vocoder (Codec) 
The GXW42XX supports a broad range of voice codecs. Under Profile web pages, choose your preferred 
order of different codecs:  
•  PCMU/A (or G711µ/a) 
•  G729 
•  G723 
•  G726 (16/24/32/40) 
•  G722 
•  iLBC 
•  AAL2 (all G726) 
Definitions 
This section will describe the options in the Web configuration user interface. As mentioned, a user can log 
in as an administrator or end-user.  
Functions available for the end-user are: 
•  STATUS: Displays the network status, account status, software version and MAC-address of the 
phone 
•  MAINTENANCE:  Basic  settings  such  as  basic  network,  date  and  time  settings,  and  web/SSH 
access settings can be set here. 










