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Appendix A: Network Communications
TCP/UDP Ports Required for Video Playback
Communication between Stream Manager devices requires a network that is enabled for IP
multicast. The "Viewing Live and Recorded Video" section on Page 2-8 explains the steps that take
place when video playback is requested. This section describes the network communication and
the TCP/UDP ports that are used during a video playback request.
Figure 74 shows the different TCP/UDP ports used during video playback from an ISP.
Figure 74.
Example—Playing Recorded Video
ISP_1 sends a Discovery Request (target UDP port 4111) on multicast group 235.1.1.1 at
approximately every 5 seconds. This request includes a new Target UDP port (range 4300–4500)
in which devices must respond. Active Stream Manager devices respond with information about
their capabilities, such as device type, name, and configuration details of each camera. This
request allows the ISP to become familiar with the current environment.
When video playback is requested, the following communication takes place:
1.
ISP_1 receives the key sequence and detects that the user wants to play recorded video.
2.
ISP_1 reads the selected camera from the matrix switch and sends a device discovery request
for an available hybrid decoder.
ISP_1 must send a new Discovery Request to ensure that a hybrid decoder is free. The
request also takes place on UDP port 4111, but includes a type of XVCRClient and state of
Free. The return target is set in the range of UDP port 4300–4500.
1.
If a hybrid decoder is available, ISP_1 sends the peripheral ID and the start date/time to the
hybrid decoder.
●
If a hybrid decoder is free, it responds (on the specified UDP port 4300–4500) to ISP_1 with
its capabilities, including the Matrix Input Port, overlay and timezone configurations.
Design Guide
I
Page I
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