Alarms; Table 5. Alarms - ADTRAN Total Access 3000 Installation And Maintenance Practice

Alarms

All active alarms are recorded in the RMM alarm display and are also reported to the SCU. The
SCU maintains corresponding entries in its alarm log and also generates SNMP and TL1 trap
notifications.
Major level alarms are generated by the WAN/DS1 interface upon Loss of Signal (LOS), Loss of
Framing (LOF), receipt of Alarm Indication Signal (AIS), or receipt Remote Alarm Indication
(RAI). Upon detection of LOS, LOF, or AIS the WAN/DS1 interface transmits RAI toward the
MUX or DSX-1 interface (as selected).
A Major level alarm is generated by the LAN interface if the Ethernet link is down. A Major
level alarm is generated if the PPP link carried by the WAN/DS1 interface goes down for any
reason. An Alert level alarm is generated whenever the WAN/DS1 interface is placed into a
loopback mode, either manually or via in-band CSU loop-up codes.
alarms generated by the RMM.
There are six external alarm inputs, consisting of two wires connectable through the Total
Access 3000/3010 loop I/O connectors (Pairs 1 – 6). The external alarm input is associated
with the "tip" connection which responds to the application or removal of –48 VDC. The "ring"
connection supplies a low current source of –48 VDC so the external alarm can be controlled
by shorting or opening the connection between the tip and ring through relay contacts. Each
external alarm can be programmed to activate upon the closing or opening of the contacts.
Each of the six (two on the Total Access 3000 High Cap) Loop I/O connectors provides a single
loop to each access module slot in the chassis. The "ring" side is associated with pins 1–28 on
the connector, and the "tip" side is associated with pins 33–60. For example, ring and tip
connections for slot 5 on a particular connector would be pins 5 and 37. External alarm
inputs 1–6 are associated with pairs 1–6, respectively.
Type Condition
DS1 RAI DS1 receive RAI
DS1 AIS DS1 receive AIS
DS1 LOF DS1 loss of frame
DS1 LOS DS1 loss of carrier
Ethernet Ethernet link down
PPP PPP link down
Loopbacks Activation of loopback mode
61181019L1-5C

Table 5. Alarms

Level Description
Major Yellow alarm received on DS1/WAN
Major All ones received on DS1/WAN
Major Loss of framing from on DS1/WAN
Major 192 consecutive zeroes received on DS1/WAN
Major Loss of Ethernet connection
Major Loss of PPP connection
Alert Loopback mode activated
Operation
Table 5 summarizes
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