Grandstream GXW42xx User Manual - Manual (Page 35)

FIRMWARE 1.0.5.8 GXW42XX USER MANUAL PAGE 33 OF 62
1. STUN Server (under Advanced Settings webpage)
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)
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/telnet