IF/E1 PRBS Test(RTN)

In this user interface, you can perform pseudo random binary sequence (PRBS) tests and export the test reports. You can perform a PRBS test on a path to check the quality of the path. The test result is displayed in the coordinates pane.

Navigation Path

In the NE Explorer, select the desired board and choose Configuration > PRBS Test from the Function Tree.

NOTICE:

Performing PRBS tests will interrupt services.

NOTE:

The opposite port must be looped back before you perform a PRBS test. Release loopback on the opposite port after the test is complete.
A service must be configured for the port for which you want to perform a PRBS test.
The PRBS test can be performed on only one port at a time.
After the test finishes, click Save As on the Test Report tab to export the test report.

Button Description

Button	Description
Start to Test	Starts the PRBS test. NOTE: The started PRBS test will not stop even if you switch to other GUIs. The vertical coordinate represents the number of bit errors found during the PRBS test. The unit is bit. The horizontal coordinate represents the test time. The graph can display 100 pieces of test results at most. The greatest value on the vertical coordinate is 100 by default. If a test finds more than 100 bit errors, the value 100 is used. The following are some default legends in use: Green: indicates that the PRBS test result is normal. That is, no bit error is found. The value 100 is used by default. Red: indicates that the PRBS test finds bit errors. The actual number of bit errors is displayed on the coordinate. In accumulative mode, the greatest value is used if the actual number of bit errors exceeds this value. Yellow: indicates that PRBS test data is invalid. The value 100 is used by default.
Stop Test	Stops the PRBS test.

Button

Description

Start to Test

Starts the PRBS test.

NOTE:

The started PRBS test will not stop even if you switch to other GUIs.

The vertical coordinate represents the number of bit errors found during the PRBS test. The unit is bit. The horizontal coordinate represents the test time.
The graph can display 100 pieces of test results at most.
The greatest value on the vertical coordinate is 100 by default. If a test finds more than 100 bit errors, the value 100 is used. The following are some default legends in use:
- Green: indicates that the PRBS test result is normal. That is, no bit error is found. The value 100 is used by default.
- Red: indicates that the PRBS test finds bit errors. The actual number of bit errors is displayed on the coordinate. In accumulative mode, the greatest value is used if the actual number of bit errors exceeds this value.
- Yellow: indicates that PRBS test data is invalid. The value 100 is used by default.

Stop Test

Stops the PRBS test.

Parameter Description

Parameter	Value	Description
Port	NE name-slot number-board name-port number(port name)	Indicates the ID of the port to be tested.
Direction	UNI, NNI Cross-connection, Tributary Radio E1 Radio E1 (Radio + Cross-connection)	Indicates the direction of sending PRBS codes. NOTE: This parameter supports only E1 Radio and Radio directions for IF interfaces of RTN 905 1E NEs.
	For example: VC4:1	Displays the Channel.
Frame Format	Framed, Unframed	Indicates the port framing mode. The framing mode must be consistent with the frame format in port attributes. This parameter is required only when Direction is UNI or NNI.
Test Period	Short (1s), Long (10 min), Very-long (1 h)	Indicates the period for reporting test results. For example, Short (1s) indicates that the test results are reported from the NE to the U2000 Web LCTevery second.
E1 Path	For example: E1-1	Indicates the timeslot channel where services to be tested reside. NOTE: Before setting this parameter, perform the following operations: Select a IF board and choose Configuration > IF Interface from Function Tree. In the right pane, set Guaranteed E1 Capacity in the Hybrid/AM Configuration area. Path varies according to the value of Guaranteed E1 Capacity.
Test Times	1 to 255	Indicates the number of test periods. Test duration = Test result reporting period x Number of test periods
Start Time	For example: Year-Month-Date Hour:Minute: Second Month-Date-Year Hour:Minute: Second Date-Month-Year Hour:Minute: Second	Indicates the test start time.
Progress	Example: 5%	Indicates the test progress.

**Table 1** Test Report
Parameter	Description
NE Name	Indicates the NE name.
SlotID	Indicates the slot ID.
Board Type	Indicates the board type.
Port	Indicates the test port.
Start Time	Indicates the test start time.
End Time	Indicates the test end time.
Test Period	Indicates the test period.
Bit Errors	Indicates the number of accumulated bit errors during the test. This parameter is in scientific notation.
BER(%)	Indicates the accumulated bit error rate (BER) during the test.
BBE	Indicates the number of accumulated background block errors during the test. Background block error (BBE) refers to the errored blocks excluding the errored blocks in the unavailable and severely errored seconds.
ES	Indicates the number of accumulated errored seconds during the test. Errored second (ES) refers to a second in which one or more errored blocks are detected.
SES	Indicates the number of accumulated severely errored seconds during the test. Severely errored second (SES) refers to a second in which 30% or more than 30% errored blocks exist or at least one severely disturbed period (SDP) exists. SDP is the period in which the BER of all the consecutive blocks in a period of less than four consecutive blocks or 1 ms (the longer period is applied) is equal to or higher than 10^-2 or the signal is lost.
UAS	Indicates the number of accumulated unavailable seconds during the test. The unavailable time begins at the onset of 10 consecutive SESs, with the 10 SESs included. When SESs disappear for 10 consecutive seconds, the available time begins from the eleventh second, with the previous 10 seconds included.