ADC CUDA 3 - Manual (Page 130)

ADC Telecommunications, Inc.
128 C HAPTER 7: P ACKET O VER SONET A DMINISTRATION
Table 7-3 describes the SONET Path statistics shown in the display.
Table 7-3 SONET Path Layer Statistics
Display Element Description
AIS — Path Alarm Indication Signal
Detections (PAIS) The number of times a Path Alarm
Indication Signal has been detected. A
PAIS occurs if all the H1/H2 pointer bytes
in the received SONET frame are 01.
RDI — Path Remote Defect
Indication Detections (PRDI) The number of times a Path Remote
Defect Indication has been detected. A
PRDI occurs if bits 5,6 and 7 of the G1
byte received with the same value for 5
consecutive frames.
FEBE (G1) Far end block errors - Indicates the
number of B3 errors that were detected
by the remote side in its receive signal.
BIP (B3) Even Parity is calculated over all bits in the
SPE, including POH of each frame. These
values are then compared to the B3
values received in the packet. Mismatches
are reported.