Table 1-4. Network Status Alarms - Bay Networks 5393 Hardware Installation Manual

PRI ISDN
Interface Port

Table 1-4. Network Status Alarms

Alarm Description
TEST The red network TEST indicator is ON when the PRI ISDN
Network Interface is looped back. Loopback tests are
activated either locally by the user or by the telephone
company.
SYNC The green SYNC indicator is ON when the PRI ISDN
interface is properly synchronized with the received
network signal and is receiving proper framing information.
LOS The red LOS indicator is ON when the PRI ISDN interface is
detecting no signal (pulses) on the network interface
receiver. When a LOS condition exists, the Remote Annex
transmits unframed all ones (AIS) to the network.
RED The RED alarm indicator is ON during a locally detected
carrier failure. During the RED alarm condition, a YELLOW
alarm is transmitted across the telephone network.
YELLOW The YELLOW alarm indicator is ON when receiving a
YELLOW alarm condition from the telephone network.
BLUE The BLUE alarm indicator is ON when receiving an
unframed, all-ones Alarm Indication Signal (AIS) from the
network. This condition exists upon a loss of originating
signal, or when any action is taken that would cause a signal
disruption.
The PRI ISDN Interface provides access to a digital PRI ISDN line.
The PRI ISDN Interface port comes with an 8-pin, RJ48C port for
attaching the PRI ISDN Interface cable connector.
Remote Annex 5393/PRI Hardware Installation Guide
Chapter 1 Introduction
1-13