Clockaudio CDT100 User Manual - Page 10
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5 – Dante Daisy Chaining
Overview:
A unique feature of the CDT100 is its ability to allow daisy chaining of devices. This allows CDT100 units in close proximity to one
another to utilize a single home run of Ethernet cable back to the switch thus saving on installation costs.
Daisy chaining simply requires the new device be connected to the spare Ethernet port of the last CDT100 device in the current
chain.
Not only can the Ethernet connection be daisy chained, power can also be daisy chained too by connecting the daisy chain power
output on the last active device to the daisy chain power input on the new device.
The number of devices that can be daisy chained is limited.
The maximum that can ever be daisy chained is 6 devices in a single chain.
Beyond that the number of switch hops may cause audio problems due to excessive latency and increased clock jitter.
The other limitation is the power supply, if power is also being daisy chained from device to device.
Standalone:
If power is supplied to the first device via a standalone supply, the supplies maximum power output determines the number of
devices it can support (assume 4W @ 12V DC per device).
To daisy chain a device to another CDT100:
Connect an Ethernet cable from the data only port of the CDT100 to one of the ports of the CDT 100 to be chained to supply
the network information.
To chain the power, connect the "Link out" connector to the "Link in" connector on the CDT100 to be chained.
A third unit could be chained by connecting it in the same way to the second unit and so on.
Network Configuration Note:
If the CDT100 units are installed in a networked daisy-chain topology, it is highly recommended to only configure unicast flows
from each of the CDT100 devices' Dante transmitters.
The addition of multicast flows along the daisy chain can overwhelm the switches in the chain with unnecessary multicast audio
traffic resulting in potential latency and network clock synchronization issues, especially on the units installed at the end of the
daisy-chain network segment.
Additionally, if there are a significant number of multicast audio flows configured on the Dante network, it is recommended that
the core network switches that interface to the daisy-chained CDT100 network segments be configured with the appropriate
IGMP settings to shield the CDT100 chain from unnecessary multi-cast audio traffic.
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Clockaudio 2015
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