User manual

Raisecom Technology Co., Ltd
17
9. Appendix B: Abbreviations
EoPDH
Ethernet over PDH
PDH
Pseudo-synchronous Digital Hierarchy
FAS
Frame Alignment Signaling
LOS
Loss of Signal
LOF
Loss of Frame
AIS
Alarm Indication Signal
CRC
Cyclic Redundancy Check
LER
Local Error Alarm: including AIS, LOF and CRC alarms.
RAL
Remote Alarm: including LOS, AIS, LOF and CRC alarms.
PAT
Pattern: indicates whether BERT function is started
SD
Signal Detect
GID
Group Identification: E1 links belong to one transmission channel have the same
ID.