Clear-Com HX System Frames - Manual (Page 89)

7.4.2 Dual card set redundancy
Dual card set redundancy is shown in Figure 29: Ring topology: Dual card set redundancy ,
with both Card set A and Card set B fitted in each node of the ring. In this case each matrix
contains two Fiber-optic Linking card sets.
This approach affords full redundancy, offering protection against component failure within a
single Fiber-optic Linking Card Set
Note:
In the absence of an Uninterrupted Power Supply this configuration will not protect against
loss of the node or Matrix itself.
Figure 29: Ring topology: Dual card set redundancy
Loss of single fiber connection
If a single fiber connection is lost on one ring and the other ring is intact then the active ring
always attempts to heal itself by reversing the direction of data flow to bypass the failed
connection. The self healing mechanism is performed autonomously by the fiber linking card.
89 Eclipse HX-Delta User Guide