Technical data

Chapter 18 531
T1 Analyzer
More Information About T1 Testing
T1 Analyzer
Figure 18-12 Flow Diagram of Out-of-band Loop-down Code Originating from the Test Set
Please note that 2
15
-1 (2047) pattern is used because it is normally used for
fractional T1 testing and has a low probability of being present on the full T1.
Auto Configuration Flow Diagram
Selecting
Auto Config causes the test set to analyze the incoming T1 signal and
align the setup choices to that signal. If the incoming data pattern is not recognized
then “NA Live Data” is displayed and the pattern selected on the setup screen will
remain unchanged. If B8ZS codes are detected then this condition will be indicated
and the line code parameter will be set accordingly. If setup was configured for
B8ZS prior to selecting
Auto Config and the pattern detected does not have
sufficient zeros density to warrant B8ZS then “NA” will be displayed and the line
No
Yes
Timeout
Test Set Stops Sends Loop-Down Code on
ESF
Test Set Waits for 900 ms
2
15
- 1 Pattern
Detected
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Test Set Sends Loop-Down Code ESF Data
Link and 2
15
- 1 Pattern In-Band
Test Set Waits for 100 ms
Test Set Reverts to Sending
User Selected Pattern