This test is destructive.

For documentation purposes, the term DS1 applies to the DS1 Interface media modules.

The Inject Single Bit Error test causes a single bit error to be sent within an active framed 3-in-24 test pattern.

The test is highly destructive and can only be initiated by entering the command test ds1-loop location inject-single-bit-error. An attempt to use this command is rejected if none of the three long-duration DS1 loopback/span tests (CPE Loopback Jack test, Far CSU Loopback test, One-Way Span test) are active on a ds1 media module.

Enter busyout board to busy out all trunks or ports on the DS1 Interface media module before running the Inject Single Bit Error test.

Enter list measurements ds1 summary to show the number of bit errors detected (Loopback/Span Test Bit-Error Count field). Injecting this single bit error should increment the bit error count of the loopback/span test by one.

Enter release board to restore all trunks or ports on the DS1 Interface media module to the in-service state.