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SONET_Usr.bk Page 211 Wednesday, December 13, 2000 11:11 AM
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Glossary of Terms
Glossary
DTMF
Dual Tone Multi
frequency Signaling
DWDM
Dense Wave Division
Multiplexing
DXC
Digital Cross Connect
E
EB
Error Block
EOW
Engineering Orderwire
ES
Error Seconds
ESF
Extended Superframe
Format
ESR
Errored Second Ratio
ETSI
European Telecommu-
nications Standards
Institute
F
FAS
Frame Alignment
Signal
FC
Foreground Channel
FDDI
Fiber Distributed Data
Interface
FEAC
Far End Alarm Channel
FEBE
Far End Block Error
FEC
Forward Error Connec-
tion
FERF
Far End Receive Failure
G
GUI
Graphical User Inter-
face
H
HDB3
High Density Bipolar 3
HEC
Header Error Control
HO Path RAI
High Order Path
Remote Alarm Indica-
tion
HO PTE
High Order Path Termi-
nating Equipment
HO
High Order
HP-IB
Hewlett-Packard Inter-
face Bus (IEEE 488)
HP-PLM
High Path Payload
Label Mismatch
HP-RDI
High Path Remote
Defect Indication
HP-REI
High Path Remote Error
Indication
HP-TIM
High Path Trace Identi-
fier Mismatch
HP-UNEQ
High Path Unequipped
Hz
Hertz (cycles per
second)
I
ISDN
Integrated Services
Digital Network
ISO
International Standards
Organization
ITU
International Telecom-
munications Union
L
LAN
Local Area Network
LO
Low Order
LOF
Loss of Frame
LOP
Loss of Path
LOS
Loss of Signal
LP-PLM
Low Path Payload
Label Mismatch
LP-RDI
Low Path Remote
Defect Indication
LP-REI
Low Path Remote Error
Indication
LP-RFI
Low Path Remote
Failure Indication
LP-TIM
Low Path Trace Identi-
fier Mismatch
LP-UNEQ
Low Path Unequipped
LSB
Least Significant Bit
211
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