Reusable channel on DWDM

[hashaari]

Hi!

Have a question on reusable channel in DWDM network. For example, let consider 3 dwdm node A B C which are corrected in a ring manner in unprotected configuration . In this case let use ONS 15540 ESPx with unprotected LCMB and TSP configuration. If I connect one A West to B East on channel 1, can I reuse channel 1 to connect B West to C East ? To my understanding, in unprotected configuration, it is possible to use reuse a channel if it's transmitted to the opposite direction while in protected configuration say splitter based, there can only be once instance of a channel in a ring. Is this correct ? Appreciate the help. Thanks.

[rtappend_2]

Yes, you are correct. You can reuse a channel in an unprotected design eg A-B and A-C. Protected channels exist over both paths between source and destination so can be used only the once.

[hashaari]

Thanks to you again for clearing that up. FYI we're also looking in this direction to optimize channel usage where protection are not required.