User guide

T1-A and T1-B Tests
Multi Protocol Test Set 217
Facility Results
RAI (Remote Alarm Indication): Indicates that the far-end equipment
has a problem with the signal that it receives from the local equipment.
UAS (Unavailable Seconds): Indicates seconds of SES after 10
consecutive seconds of SES.
³ Events - CNT, BER, ES, EFS, %EFS, or SES: indicates the event types
and allows the selection of the count (CNT), Bit Error Rate (BER),
count of Errored Second (ES), count of Error Free Second (EFS),
percentage of Error Free Second (%EFS), or count of Severely Errored
Second (SES).
CRC (Cyclic Redundancy): Occurs when the error is received in the
payload.
BPV (Bipolar Violation): Occurs when the next successive pulse in
transmission, is of the same polarity at the previous pulse.
Fbits (Fbits is Framing Bit error): Indicates that an incorrect value
appeared in a bit position reserved for framing.
1’s Den: Occurs when 1’s density has been violated.
Exz (Excessive Zeroes): EXZ or EZ is a type of error event in DS1 T1/E1
and DS3 T3/E3 interfaces when an AMI-coded signal occurs more than
fifteen contiguous zeroes. For a B8ZS coded signal, the defect occurs
when more than seven contiguous zeroes are detected.
Note: When there is no error, event, and bit
error, the NO ERRORS is displayed if
Show NO ERRORS is selected (see
Show NO ERRORS on page 255).