Verilink PRISM 3301 (34-00239.5) Product Manual - Manual (Page 32)

24 C HAPTER 4: T ERMINAL I NTERFACE
User Tx Remote Line Loop-down Code to FE
HSSI Tx Remote Line Loop-up Code to FE
HSSI Tx Remote Line Loop-down Code to FE
Remote Line Loopback Set From FE
Remote Line Loopback Clear from FE
Remote Line Loopback Set from NE
Remote Line Loopback Clear from NE
Internal Error
NVRAM Crc Check Failure
Code Eprom Checksum Failure
Xilinx Eprom Checksum Failure
QUERY LOOP
This command displays a summary of the Local DTE, Local Line, Remote Line,
and Remote Line Request loopback conditions as either On or Off.
QUERY PERFORMANCE EFS
This command displays the performance data for Error Free Seconds. An Error
Free Second for a DS3 channel is any second of transmission during which no bit
errors are received. The proportion of error-free seconds is the ratio of one-second
intervals not containing any bit errors to the total number of seconds in an
observation period (usually 24 hours). This ratio is expressed as Percent Error-Free
Seconds (%EFS).
QUERY PERFORMANCE ES
This command displays the performance data for Error Seconds. An Errored
Second is any second during which one or more bits are in error, and includes
detection of one or more M-frame Errors, Loss Of Signal (LOS), one or more Out
Of Frame (OOF) conditions, or presence of an Alarm Indication Signal (AIS).
Three types of Errored Seconds are monitored.
Errored Seconds - Type A (ES-A). A Type A Errored Second is one with exactly
one errored M-frame, and no occurrence of any LOS, OOF, or AIS condition.
Errored Seconds - Type B (ES-B). A Type B Errored Second is one with more than
one, but less than or equal to 44 errored M-frames, and no occurrence of any LOS,
OOF, or AIS condition.
Errored Seconds - Type C (ES-C). A Type C Errored Second is one with more than
44 errored M-frames and/or an LOS, OOF, or AIS condition.
QUERY PERFORMANCE SES
Displays the performance data for Severely Errored Seconds. A Severely Errored
Second is any second during which the Bit Error Rate is worse than 1x10
-3
.