ONS 14454 SSM, Why is it sending DUS out this interface?

[iahegdal]

We have a 454 with three timing references set up-

Ref-1 = BITS-1

Ref-2 = OC-48 Slot 12

Ref-3 = OC-48 slot 6

The unit is using Ref-1 for timing. Both optical interfaces are set to use SSM and I have veriifed that they are. The OC-48 interface in slot 12 is sending DUS to it's neighbor, Slot 6 is sending PRS. If I change the timing to Ref-3 (slot 6) the SSM out of slot 12 changes to PRS. If I switch timing back to BITS then slot 12 changes SSM to DUS.

My expectation is when using BITS that all optical interfaces with SSM enabled would send SSM PRS.

Anybody have any explaination as to why slot 12 is sending DUS in this configuration?

Thanks

Ian

[iahegdal]

I finally figured this out. The BITS-1 and BITS-2 Out interfaces were using one of the optical interfaces as their reference source. Apparenty this results in the NE sending SSM DUS out the optical interface being used to time the BITS "Out" interfaces.