Cisco 8620, Справочное руководство

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Cisco Video Surveillance 8620/8630 IP Camera Reference Guide
Chapter 5 Configuration
Network > QoS (Quality of Service)
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:
Invalid port number. Multicast stream 1 video port must be an even number.
•
Multicast TTL [1~255]—The multicast TTL (Time To Live) is the value that tells the router the
range a packet can be forwarded.
The Multicast metadata port is utilized by Cisco VADP (Video Audio development platform)
modules to transfer video analytics results, PTZ stream, textual data, and event messages between
the camera and the client side running and observing the video analysis. If your client side computer
is located outside the local network, you may need to open the associated TCP port on routers and
firewall.
SIP
SIP is short for Session Initiation Protocol. If necessary, you can change the default port number, 5060,
to one between 1025 and 65535.
•
Two way audio port—The camera supports two way audio communication so that operators can
transmit and receive audio simultaneously. By using the camera built-in or external microphone and
an external speaker, you can communicate with people around the camera.
As JPEG only transmits a series of JPEG images to the client, to enable the two-way audio function,
make sure the video mode is set to H.264 on the Media > Video > Stream settings page and the media
option is set to Media > Video > Stream settings on the Client Settings page.
Network > QoS (Quality of Service)
Quality of Service refers to a resource reservation control mechanism, which guarantees a certain quality
to different services on the network. Quality of service guarantees are important if the network capacity
is insufficient, especially for real-time streaming multimedia applications. Quality can be defined as, for
instance, a maintained level of bit rate, low latency, no packet dropping, and so on.
Initial TTL Scope
0 Restricted to the same host
1 Restricted to the same subnetwork
32 Restricted to the same site
64 Restricted to the same region
128 Restricted to the same continent
255 Unrestricted in scope