Appendix D. TSU 120 System Messages
120
TSU 120 User Manual
61200.129L1-1
ALARM MESSAGES
Network Interface (NI)
The following messages indicate an alarm condition
on the network interface:
Red Alarm
NI unable to frame align with
incoming signal
Yellow Alarm
Remote alarm indication (RAI)
being received from far end
Blue Alarm
Unframed all ones (1s) (AIS)
being received at NI
Loss of Signal
No signal detected at NI
Nx56/64 Interface
The following messages indicate an alarm condition
on the Nx56/64 card:
Clock Slip
Difference in frequency of the
data clock at the network and
DTE
PLL Alarm
Unable to achieve Phase Locked
Loop on theclock provided by the
network interface
Zeros Alarm
All zeros (0s) data being sent
toward the network interface
FIFO Alarm
Error in propagation of data
through the FIFOS
No EXT Clock
No external transmit clock at DTE
(only appears if EXT CLK is
selected)Status Messages
Summary of Contents for TSU 120
Page 1: ...TSU 120 PART NUMBER 1200129L1 USER MANUAL 61200 129L1 1A July 1997...
Page 52: ...Chapter 2 Installation 38 TSU 120 User Manual 61200 129L1 1...
Page 132: ...Appendix C System Configuration Charts 118 TSU 120 User Manual 61200 129L1 1...
Page 138: ...Appendix D TSU 120 System Messages 124 TSU 120 User Manual 61200 129L1 1...