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4-14 Operating Your Vanguard 7300
Vanguard 7300 Port Configuration
Voice Port Configuration
Introduction This section describes the H.323 Version 2 features. For more information on H.323
voice parameters, see the Vanguard Voice Manual (Part Number T0104-05).
Dynamic Coder for H.323
Description H.323 Dynamic Coder lets you configure your 7300 device to ensure that your calls
are successfully placed. This is done using coder negotiation between other H.323
devices. This feature is limited to H.323 calls only.
How Does It Work? Using H.323 Dynamic Coder, the Public Switch Telephone Network (PSTN) port on
your 7300 device can be configured to allow the H.323 interface to advertise all of its
supported coders with a remote H.323 device. This action prompts the H.323
interface to dynamically negotiate, with the remote H.323 device, for a voice
compression coder, bundle format, and Voice Activity Detection (VAD) control
setting. If necessary, the PSTN port is re-configured to match the negotiated settings.
Supported Voice Compression Coders
The 7300 Series supports these voice compression coders:
• G.723.1
•G.729A
•G.711U
•G.711A
When negotiations take place, supported coders are provided in a prioritized list. The
highest prioritized coder in the list is the PSTN port configuration. The second
highest is the same coder with the opposite VAD setting. Any remaining coders
follow in this order: G.723.1, G.729A, G.711U, and G.711A.
Note
If H.323 Dynamic Coder is not enabled, the H.323 interface does not advertise
the current configuration (compression rate, bundle format, and VAD setting)
and negotiations do not take place. If the remote H.323 device cannot match the
PSTN ports configuration, the call is cleared.
Accessing and
Configuring
Dynamic Coder
Dynamic Coder for H.323 introduces one new parameter under the Port
Configuration menu. Use these steps to access the H.323 Dynamic Coder parameter:
1) Select Configure from the main menu.
2) Select Port, type the appropriate port number and press enter.
3) Type voice and press enter.
Figure 4-8 shows an example of the Port Configuration Menu and the H.323
Dynamic Coder parameter.