Chassis Alarms
Chassis alarms pertain to failures that affect the overall operation of Access-T.
There are three chassis alarms:
•
Loss of Master Clock (MSTR CLK LOSS):
Access-T has lost its master
clock signal. Access-T cannot detect master clock loss when the clock source is
the Aux port; thus Access-Twill not declare Loss of Clock in this case.
•
Internal Communication Failure (INT COMM LOSS):
Access-T
cannot communicate between the lower and upper boards (4-port
unit only).
•
Loss of Network Interface Module (NIM LOSS A or B): NIM LOSS
A
indicates that the NIM software is not responding.
NIM LOSS B
refers to NIM loss on the upper board (4-port unit only).
DTE Alarms
The DTE alarms (PORT n LOSS) indicate that Access-T has lost the Request to
Send (RTS) signal input at DTE Port n, where n = 1 to 4.
ACST-0351-005
Chapter 2
June 1996
Access-T Functional Overview
2-19
