HP ProCurve 7000dl Series Basic Management And Configuration Manual page 254

Configuring E1 and T1 Interfaces
ProCurve Secure Router Modules
4-24
Table 4-5. Events That Trigger Line Errors
Error Type
BES
CSS
DM
ES
LCV
LES
PCV
SEFS
SES
Triggers
1-320 Path Coding Violations (PCV)
Controlled Slip Seconds (CSS)
Bit Error Rate (BER) between .000001 and .001
ESF and CRC4:
– PCV
– Out Of Frame (OOF)
– CSS
– Alarm Indication Signal (AIS)
D4 or E1:
– PCV
– Out of Frame
– CSS
– AIS
– BPV
Bipolar Violations (BPVs) and Excessive Zeros (EXZs)
• Seconds with BPVs or EXZs or Loss Of Signal (LOS)
• Seconds with Line Code Violations (LCVs)
E1/D4 frame synchronization errors
CRC4 or ESF checksum error
• OOF
• LOS
• ESF errors:
– 320+ PCVs
– OOF
– AIS
• CRC errors:
– Severely Errored Seconds (SES)
– 832+PCVs
• E1 framing 2048+ LCVs