4
X
E1/G.703 P
LESIOCHRONOUS
M
ULTIPLEXER
O
PERATING
M
ANUAL
IOA77-1F
IV
May 2007
List of abbreviations
AACK Alarm
Acknowledgement
ACK Alarm
Acknowledged
AIS
Alarm Inhibition Signal
AISL
AIS from Local interface
AISR
AIS from Remote device
BBE
Background Block Error
ES Errored
Second
ES15
15 Minutes Errored Second Counter
ES24
24 Hours Errored Second Counter
ESFE
Errored Second Far End
ETSI
European Telecommunications Standards Institute
GND Ground
ITU-T
International Telecommunication Union – Telecommunication Standardization
Sector
LDF
Laser Diode Failure
LOESx
Loss of Electrical Signal
LOF
Loss of Frame
LOOS
Loss of Optical Signal
LOS
Loss of Signal
NUAL Non-Urgent
Alarm
NUALA
Non-Urgent Alarm Relay
UALA
Urgent Alarm Relay Urgent
RAL Remote
Alarm
SES
Severely Errored Second
SES15
15 Minutes Severely Errored Second Counter
SES24
24 Hours Severely Errored Second Counter
SESFE
Severely Errored Second Far End
SESFE15 15 Minutes Far End Severely Errored Second Counter
SESFE24 24 Hours Far End Severely Errored Second Counter
UA Urgent
Alarm
UAL Urgent
Alarm
UAS Unavailability
Second
VIOL Violation
