Toa D-2000 Series Installation - Manual (Page 42)

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4.10. System Expansion Using CobraNet Connection
4.10.1. CobraNet connection outline
The system can be expanded by inserting the D-2000CB CobraNet Interface Module into the D-2008SP and
connecting it to other CobraNet equipment.
Connect the D-2000CB to other CobraNet equipment via a switching hub.
Connect each of CobraNet Primary and Secondary ports of the D-2000CB to the same switching hub or
different switching hubs connected in cascade.
D-2008SP
D-2000CB
CobraNet terminal (PRIMARY)
CobraNet terminal (SECONDARY)
Notes
• Make the CobraNet terminals completely independent from other LAN.
• The distance between each of D-2000CB modules and the switching hub is less than 100 m.
• Be sure to make connections of both terminals PRIMARY and SECONDARY.
• Audio signals may be interrupted temporarily at the time of switching between PRIMARY and SECONDARY
ports.
• When connecting CobraNet terminal PRIMARY or SECONDARY to multiple switching hubs, be sure to
connect the hubs in cascade.
• Up to 7 switching hubs can be connected in cascade. The number of switching hubs between the D-2000CB
and all CobraNet devices connected to the D-2000CB should be 7 or less. (Refer to connection examples 1
and 2 on the next page.)
• When using multiple switching hubs, making star connection at the hub directly connected to the D-2000CB
as shown in Connection example 2 is highly recommended to reduce the number of cascade-connected
hubs.