Vivotek FD8136-F2 User Manual Page 65

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VIVOTEK
User's Manual - 65
Multicast settings for stream 1 & 2: Click the items to display the detailed configuration information.
Select the Always multicast option to enable multicast for stream 1 or 2�
Unicast video transmission delivers a stream through point-to-point transmission; multicast, on the other
hand, sends a stream to the multicast group address and allows multiple clients to acquire the stream at
the same time by requesting a copy from the multicast group address� Therefore, enabling multicast can
effectively save Internet bandwidth�
The ports can be changed to values between 1025 and 65535� The multicast RTP port must be an even
number and the multicast RTCP port number is the multicast RTP port number plus one, and thus is
always odd� When the multicast RTP port changes, the multicast RTCP port will change accordingly
If the multicast RTP video ports are incorrectly assigned, the following warning message will be
displayed:
Multicast TTL [1~255]: The multicast TTL (Time To Live) is the value that tells the router the range a
packet can be forwarded�
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