SSS Siedle DoorCom IP Multi DCIP 740 Series, Manual, Page: 23 / 32

23
6 Configuration
Multicasting
Multicasting
Alongside the 1:1 connection
between one encoder and one
receiver (Unicast) the IPVS 600‑...
also offers facility for several soft‑
ware clients to receive the video
signal at the same time. This takes
place either by duplicating the
data stream in the IPVS 600‑... and
subsequent distribution over several
software clients (multi‑unicasting)
or by distribution of an individual
data flow in the network itself to
several recipients in a defined group
(multicasting). For each encoder
(video input) it is possible to enter
a separate multicasting address
each per stream and to enter the
relevant port. It is possible to change
between the streams by clicking on
the relevant index tab.
Note
The requirement for multicasting
operation is a network with mul‑
ticasting capability using the UDP
protocol and the IGMP protocol.
Other group management protocols
are not supported. The TCP protocol
does not support multicast connec‑
tions. The requirement for multicast
operation in a network with multi‑
casting capability is the set‑up of a
special IP address (class D address).
The network must support the
setup of a group IP address and
the Internet Group Management
Protocol (IGMP V3). The address area
is 225.0.0.0 to 239.255.255.255.
The multicast address can be the
same for several streams. However,
in this case it is necessary to use a
different port in each case to ensure
that several data streams are not
transmitted simultaneously via the
same port and the same multicast
address.
The settings must be entered sepa‑
rately for each encoder (video input)
and each stream.
Multicast address video 1
Enter a valid multicast address for
each stream of the relevant encoder
(video input) which you wish to
work in the multicast mode (dupli‑
cation of the data streams in the
network). With the setting 0.0.0.0,
the encoder works for the relevant
stream in the multi‑unicast mode
(copying the data streams in the
device). The IPVS 600‑... supports
multi‑unicast connections for up to
five recipients connected simultane‑
ously. Duplication of the data in
the device requires high computing
power and can compromise image
quality under certain circumstances.
Port:
With simultaneous data streams to
the same multicast address, the data
streams must be assigned to dif‑
ferent ports.
Enter the port address of the rel‑
evant stream here.
Streaming
Click in the checkbox in order to
activate multicast streaming opera‑
tion for the relevant stream. An acti‑
vated stream is marked with a tick.
Multicast audio port 1
Alongside video data, audio sig‑
nals can also be transmitted and
received. Audio transmission takes
place in a separate data stream in
parallel to the video data and so
increases the network load. The
audio data is encoded in accordance
with G.711 and requires an addi‑
tional bandwidth of appr. 80 kBit/s
per direction.
If audio signals have to be trans‑
mitted in multicasting mode, these
must be assigned to their own port
as this is a separate data stream.
Enter the port address of the rel‑
evant stream here.
Audio signals are only transmitted if
the audio settings and audio func‑
tion are switched on in the configu‑
ration.
Multicast package TTL
A value can be entered which deter‑
mines how long the multicast data
packages are active in the network.
If multicasting is operated via a
router, the value must be greater
than 1.