Grandstream Networks HT502 User Manual

Page 16

Grandstream Networks, Inc.

HT-502 User Manual

Page 16 of 31

Firmware Version 1.0.1.21

Last Updated: 12/2008

NOTE: If you can not log into the configuration page by using the default password, please check with the
VoIP service provider. It is most likely the VoIP service provider has provisioned the device and configured
for you therefore the password has already been changed.

Important Settings

The end-user must configure the following settings according to the local environment. NOTE: Most
settings on the web configuration pages are set to the default values.

NAT

ETTINGS

If you plan to keep the gateway within a private network behind a firewall, we recommend using STUN
Server. The following three (3) settings are useful in the STUN Server scenario:

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. Use Random Ports (under Advanced Settings webpage)

This setting depends on your network settings. 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

ETHODS

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.

REFERRED

VOCODER

ODEC

)

The HT502 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
• AAL2

(all

G.726)