VCS VideoJet 8000, Руководство пользователя

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Configuration using a Web Browser Chapter 5
66 VideoJet 8000
The MPEG-2 data transfer protocol is designed for at most one multi-unicast
connection to each encoder. The transparent data connection is maintained by
the first unit. However after about 15 seconds of inactivity, the data connection is
automatically terminated and another unit can exchange transparent data with
the transmitter.
For multilink operation, the network need not be multicast-capable, because the
VideoJet 8000 is also multi-unicast compatible. Duplication of the data on the unit
requires considerable processor power and, under certain circumstances, leads
to limitations in the picture quality.
When the multicast address is set to 0.0.0.0 , the VideoJet 8000 operates in multi-
unicast mode (copies the data streams on the unit).
If a valid multicast group IP address is entered for each encoder, the unit operates
in the multicast mode (duplication of the data stream on the network).
Multicast address encoder 1 ... Multicast address encoder 8:
A special IP address (class D address) must be configured for multicast operation
in a multicast-enabled network.
The network must support group IP addresses and the Internet Group
Management Protocol (IGMP). The address space is from 224.0.1.0 to
238.255.255.255.
The multicast address can be the same for multiple encoders. Then however it is
necessary to use a different port in each case so that multiple data streams are
not sent simultaneously over the same port and multicast address.