Settings/H.323/Codec - Grandstream Networks GVC3200 Administration Manual

It is used to define whether to enable H.460.18/19 to support H.323 account, in order
to make the IP calls through public Internet without intermediate nodes. To use this
Enable H.460
feature, set "Use NAT IP" to the public IP for GVC3200/3202 under
GVC3200/GVC3202 web UI→Settings→General Settings.
This configures GK discover mode to be "Auto" or "Manual".
•
GK Discover
•
Mode
The default setting is "Auto".
It used to configure H.323 conference ID of the GVC3200/3202. The GVC3200/3202
Site Number
can be reached by calling the site number. The site number is numeral only.
GK
Authentication Enter the username for GK authentication.
Username
GK
Authentication
Enter the password for GK authentication.
Password
This specifies the frequency (in minutes) in which the device refreshes its registration
Register
with the specified registrar. The default value is 60 minutes (1 hour). The maximum
Expiration (Min.)
value is 1,440 minutes (1 day). The minimum value is 1 minute.
H.323 Local Port
This defines the local H.323 port used to listen. Default value is 1720.
It is used to enable the symmetric RTP mechanism. If set to "Yes", the GVC3200/3202
Symmetric RTP
will use the same socket/port for sending and receiving the RTP messages. The
default setting is "No".

Settings/H.323/Codec

Parameters Descriptions
This parameter specifies the mechanism to transmit DTMF digits.
There are 3 supported mode:
DTMF
PCMA, PCMU, G.722 and G.722.1 are supported on the device for the H.323 account.
Preferred
Users can select the vocoder from the "Available" list to "Selected" list, and configure
Vocoder
the vocoder priority by adjusting the order in the "Selected" list. The "Selected"
If set to "Auto", the device will discover GK automatically and register to GK.
If set to "Manual", please configure "GK Address" and "Site Number". The device
will discover GK via GK address and register to GK.
•
In audio
•
RFC2833
•
H245 signal.
GVC3200/3202 Administration Guide
Version 1.0.3.64
P a g e | 52