User manual

Product Description
Tests and Loopbacks
2-34 July 2004 Wide Bank 28 DS3 - Release 2.4
DS3 Loopcode Detection
When the Wide Bank is configured for C-bit framing mode the DS3 monitors and detects DS3
loopback requests sent over the C-bit far-end alarm and control signal. When a DS3 loopback code
word is received a line loopback is activated.
Internal Tests
Microprocessor and memory data paths are tested within the Wide Bank by using self-tests. A
complete self-test runs when power is turned on. Individual self-tests can be run by using the test
command (see Chapter 7 and Chapter 8).
DS3 Alarm and Performance Monitoring
The Wide Bank is capable of monitoring the following DS3 alarms and performance parameters:
DS3 Alarm Signals
 Alarm Indication Signal
 Loss Of Signal
 Out Of Frame
 Idle Sequences
 Remote Alarm Indication
 Far-End Alarms
DS3 Errors
 Line Code Violations
 Excessive Zeros
 P-bit Parity Errors
 C-bit Parity Errors
 Far-End Block Errors
 Framing Bit Errors