Chapter 7 Test Results
E1 Results
80 SmartClass E1 Tester User’s Guide
Interface results
The Interface category lists results related to the physical interface. Table 12
describes the results that appear in the Interface category.
Ref Clk Frequency Frequency of the reference clock
Rx Level Vpp Current receive level, in volts peak-to-peak
Rx Level dBnom Current receive level, in dB nominal
Code Errors Number of detected violations of the selected encoding
method.
Code Error Rate Ratio of code errors received to the total number of bits
received
Timing Slips Number of bit slips (±) counted when the E1 test signal slips
from the E1 reference signal after both signals are present
simultaneously. Counts from 0 to + or - 255, and then rolls
over to 0. Resets to 0 if signal present is lost on the ana-
lyzed E1 circuit or on the reference E1 circuit. A positive
results indicates that the analyzed E1 circuit is faster than
the reference E1 circuit.
Frame Slips Number of frame slips (absolute value) counted when the
E1 test signal slips from the E1 reference signal after both
signals are present simultaneously.
Table 11 Signal test results (Continued)
Result Description
Table 12 Interface test results
Result Description
LOF Alarms Number of times the LOF condition was detected
LOF Seconds Seconds in which loss of framing was detected
AIS Alarms Number of alarm indication signals detected
AIS Seconds Number of seconds in which AIS was detected
RDI Alarms Number of Remote Defect Indication alarms
RDI Seconds Number of seconds in which RDI was detected
MF AIS Alarms Number of Multi Frame Alarm Indication Signals
detected
MF AIS Seconds Number of seconds in which MF-AIS was detected
MF RDI Alarms Number of Multi Frame Remote Defect Indication
alarms detected
MF RDI Seconds Number of seconds in which MF-RDI was detected
FAS BIT Errors Number of errored Frame Alignment Signal bits
detected
FAS BIT Error Rate Ratio of errored FAS bits to the total number of FAS
bits received
FAS Word Errors Number of errored FAS words detected
MFAS Word Errors Number of errored MFAS words received since initial
frame sync
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