EDS-405A/408A Series User’s Manual
Featured Functions
3-25
Note that the ring coupling settings for a “Turbo Ring V2” ring are different from a “Turbo Ring”
ring. For Turbo Ring V2, Ring Coupling is enabled by configuring the “Coupling Port (Primary)”
on Switch B, and the “Coupling Port (Backup)” on Switch A only. You do not need to set up a
coupling control port, so that a “Turbo Ring V2” ring does not use a coupling control line.
The “Coupling Port (Backup)” on Switch A is used for the backup path, and connects directly to
an extra network port on Switch C. The “Coupling Port (Primary)” on Switch B monitors the
status of the main path, and connects directly to an extra network port on Switch D. With ring
coupling established, Switch A can activate the backup path as soon as it detects a problem with
the main path.
ATTENTION
Ring Coupling only needs to be enabled on one of the switches serving as the Ring Coupler. The
Coupler must designate different ports as the two Turbo Ring ports and the coupling port.
NOTE
You do not need to use the same EDS unit for both Ring Coupling and Ring Master.
Dual-Ring Configuration (applies only to “Turbo Ring V2”)
The “dual-ring” option provides another ring coupling configuration, in which two adjacent rings
share one switch. This type of configuration is ideal for applications that have inherent cabling
difficulties.
Dual-Ring for a “Turbo Ring V2” Ring
Ring A
Master
Master
Ring B
