Specifications

Installation and Operation Manual Chapter 1 Overview
DXC-100PSX Functional Description 1-17
DXC-100
Figure 1-13. Narrowband Normal Operation
Narrowband Protection Operation
In the event that a fault or failure is detected within a primary DXC-100
narrowband module set, a system-level alarm will be issued and the
DXC-100/DXC-100PSX narrowband 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 Communications - 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
 Missing DXC-100/PSX Cable - D8E1T1 cable to DXC-100PSX primary
interface module removed