External Alarms - Ericsson CME 20 R6.1 Reference Manual

29

External Alarms

A number of customer-defined external alarm sources can be supervised
by the RBS. The raising or termination of a supervised external alarm is
reported to the BSC, for subsequent presentation to the operator.
29.1 Concepts
External Alarm
Basic Character set
Table 17
Character
Space
0 1 2 3 4
: ; < = >
A B C D E
P Q R S T
_
29.2 Function
Associated with each supervised external alarm are the following
parameters:
Alarm identity
Alarm severity
Alarm data
Alarm criterion
Each of these parameters is initially defined manually on RBS
installation, using an OMT. Subsequently any of these parameters may
be modified using an OMT.
The RBS supervises each configured external alarm. An external alarm
is filtered, that is, must remain in a state for a fixed period of time
(approximately 3 seconds) before the BSC is notified of the external
alarm raising or termination.
EN/LZT 123 2697 R5A
1998-08-13
An alarm that originates from a source
defined by the customer
A subset of the CCITT International
Alphabet No 5, International Reference
Version viz:
Basic Character set
5 6 7 8 9
? @
F G H I J
U V W X Y
The numeric identity of a specific external
alarm within the RBS.
There are two possible severity
classifications. The classification of a
specific external alarm is fixed when
defining the external alarm. How to handle
a severity level is customer-defined.
An alphanumeric string which is presented
to the operator when the external alarm is
raised. A basic character set is allowed,
see Section 29.1 Concepts on page 177.
The way in which the external alarm
functions, either opening or closing the
circuit on the external alarm input.
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K L M N O
Z
External Alarms
Code
20
hex
30 - 39
hex hex
3A - 40
hex hex
41 - 4F
hex hex
50 - 5A
hex hex
5F
hex
177 (306)