Special Tunnel & Network Settings - Vidicode V-Tap Manual

Tunnel UDP/RTP Port Filter
UDP packets, coming from the local network, can be filtered in the
same way as TCP packets. The SIP protocol uses most of the time UDP
with a random higher port number to transport the voice data, the
so called RTP stream.
With standard SIP on the local network, this filter can be set to 0
(zero) to allow the V-Tap unit to take all UDP packets.
When the RTP stream is known, it is possible to enter a range of
ports; for example "40000-44000" or "8000-12000".
Note: All UDP packets that have the same port number as the
entered "Tunnel TCP/SIP Port Filter" are also stored.
3.3.3
Next follows a description of some settings for the Tunnel and network,
which must be entered in
.TS<port> = Tunnel Source Port (default 0 = random)
The Source Port also has an important role in the Tunnel protocol.
The default number 0 selects randomly a port number between
49152 and 65535. This range of port numbers is recommended by
IANA to be used for dynamic ports.
Once a connection has been established between the V-Tap and the
receiving Tunnel server, the chosen port number is kept active for
the duration of the communication session. When connection is lost
for some reason, a new source port is chosen for the next
connection. This ensures fast reconnection, because the TCP protocol
does not allow the same source port to be used again within a short
time. After an OS specific timeout of normally a few minutes, the
port numbers become available again for reuse.
It is therefore not recommended to select a fixed number for the
Tunnel Source Port in cases where live streaming is done without
using an SD card.
V-Tap VoIP Manual EN v3.23 Aug 2021
Special Tunnel & Network settings
Special Settings & Commands.
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