content_image/989567.jpg
8. After clicking NEXT , we check the configuration before confirming any changes, as shown in Figure 16-16. 

<img src='content_image/989567.jpg'>

9. After the configuration is applied, the CTN is active and the CPC time of day is directed to the ETS. The result is shown in Figure 16-17 on page 401. 

Saving the CTN configuration across PORs:  The resulting default configuration allows other CPC to be added to this CTN (“unrestricted CTN”). However, because no coupling links are used, this addition is not possible. 

Also, the configuration of an unrestricted CTN does not persist after a Power-on-Reset (POR); that is, the configuration is not saved. Therefore, the CTN must be reconfigured after a POR. 

To save the CTN configuration across PORs, the CTN membership must be restricted as described next. 

