Specifications

Chapter 1 Overview Installation and Operation Manual
1-14 Functional Description DXC-100PSX
condition. See 1 Figure 1-11 for an overview of the normal operation utilizing both
BB1 (shown in black) and BB2 (shown in gray) redundancy groups.
DXC-100
Figure 1-11. Broadband Normal Operation
Broadband Protection Mode Operation
In the event that a fault or failure is detected within a DXC-100 broadband
primary module set, a system-level alarm will be issued and the
DXC-100/DXC-100PSX broadband redundancy switching process will commence.
This process is as follows:
1. DSMC.2 (or DXNM) detects module-level fault or failure condition, such as:
 Missing System Clock – DXC-100 16.384MHz clock signal not being
received
 Missing Frame Sync Pulse – Midplane TDM synchronization not being
received
 Invalid Fabric Timeslot – Module no longer interfacing fabric due to
timeslot conflict
 Incorrect Framer Values – Framer resident registers do not match shadow
copy
 Lost Supervisory Channel – System manager no longer communicating
with module
 Missing Front Module – Application module removed, lost power, or
defective
 Missing Rear Module – Interface module removed, lost power, or
defective.