Grandstream-networks GXW400x Manuel d'utilisateur télécharger pdf (Page 20)

Grandstream Networks, Inc. GXW-400x User Manual Page 20 of 39

Firmware 1.0.0.39 Last Updated: 5/2007

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. Use Random Ports (under Advanced Settings webpage)

It really depends on your network settings, so set this parameter to Yes or No, whichever works.

Generally if you have multiple IP devices under the same network, it should be set to Yes. If using a

Public IP address, set this parameter to No

3. 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

Enable one or more DTMF methods based on your PBX system.

Preferred VOCODER (Codec)

The GXW–400x supports a broad range of voice codecs. Under Profile web pages, choose your

preferred order of different codecs:

• PCMU/A (or G711µ/a)

• G729 A/B/E

• G723

• G726 (16/24/32/40)

• iLBC

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Grandstream-networks GXW400x Manuel d'utilisateur Page 20