Multicast And Unicast Bundles - Yamaha DME4io-C Owner's Manual

Introduction to the DME Satellite

Multicast and unicast bundles

CobraNet bundles can be either multicast or unicast.
Multicast bundles are transmitted from one device to multiple devices on the network (one-to-many). Unicast
bundles are transmitted from one device to another (one-to-one).
Unicast bundles are transmitted only when another device is configured to receive them by assigning the same
bundle numbers. On the other hand, multicast bundles are transmitted to all devices on the network regardless of
whether any devices are configured to receive them, and only devices that are configured to receive those bundles
actually process them.
It is recommended that no more than four multicast bundles (offering up to 32 channels) be used, since transmis-
sion of multicast bundles consumes more network resources.
Unicast bundles should be used if five or more bundles are required. It is also possible to set multiple devices to
receive the same unicast bundle number, and depending on the transmitting device up to 4 receiving devices may
be able to simultaneously receive the same bundle. This situation is known as "multi-unicast." The DME Satellite
is capable of handling multi-unicast bundles.
Multicast and unicast bundles are identified by bundle number. Multicast bundles are numbered 1 through 255.
Unicast bundles are numbered 256 through 65,279.
Multicast bundle
If Device A is transmitting multicast
bundles, they will be transmitted to
all devices on the CobraNet net-
work (e.g., Devices B, C, and D in
the example).
Unicast bundle
If Device A is transmitting unicast
bundles, and the same bundle num-
bers are assigned to the transmitting
bundles on Device A and receiving
bundles on Device D, then Device
A will transmit the unicast bundels
to Device D.
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DME8i-C/DME8o-C/DME4io-C Owner's Manual
CobraNet Device CobraNet Device
A B
Network
C D
CobraNet Device CobraNet Device
CobraNet Device CobraNet Device
A B
Network
C D
CobraNet Device CobraNet Device
Digital Audio Data
Digital Audio Data