Vivotek PZ7121 User Manual download pdf (Page 39)

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User's Manual - 39

RTSP port /RTP port for video, audio/ RTCP port for video, audio

The RTSP (Real-Time Streaming Protocol) controls the delivery of streaming media� By default, the port

number is set to 554�

■ The RTP (Real-time Transport Protocol) is used to deliver video and audio data to the clients. By

default, the RTP port for video is set to 5556 and the RTP port for audio is set to 5558�

■ The RTCP (Real-time Transport Control Protocol) allows the Network Camera to transmit the data by

monitoring Internet trafc volume. By default, the RTCP port for video is set to 5557 and the RTCP port

for audio is set to 5559�

The ve ports can be changed between 1025 and 65535. The RTP port must be an even number and

the RTCP port is RTP port number plus one, and thus always be odd� When the RTP port changes, the

RTCP port will change accordingly�

If the RTP ports are incorrectly assigned, the following warning message will display:

Multicast settings for stream 1 / Multicast settings for stream 2: Click the items to display the detailed

congutations. Select the Always multicast to enable multicast for stream 1 or stream 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, multicast can

effectively save Internet bandwith�

The five ports can be changed 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 it is

always be 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 display:

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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Vivotek PZ7121 User Manual Page 39