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VP-102 / VP-202 User Manual
32
Relay Proxy
mode is a proprietary NAT protocol and it requires the use of our Relay Proxy
Server. All VoIP signaling packets are encapsulated (encrypted as well if enabled) and
transmitted via another port/channel. Three relay modes of operation are supported.
Mode 1: Use UDP packets and encryption.
Mode 2: Use UDP packets and encryption; use single UDP port.
Mode 3: Use TCP packets and encryption; Use single TCP port;
The mode 2 and mode 3 are the passive and the port use is assigned by the RELAY SERVER.
Note
: For Service providers, RELAY Proxy software is available at no charge. Please contact
your supplier for support. For end user, please contact your service provider to see if this feature
is available.
2.4.3.3 Media Settings
Once a VoIP call is established, the Media channel is used for voice transmission. The settings listed
below configure the performance and operation of the Media channel.
1.
RTP Port (range)
– Audio stream is transmitted via Real Time Protocol (RTP) and at least 4
ports are used per voice channel. The default port range is 16384 – 32768. Specify the port
range depending on your network environment if needed.
2.
Packet length (ms)
– This specify the length of a voice packet. The default packet length is 20
ms.
