ADC H4TU-C-319 List 1 Line Unit Testing with H4TU-R Bert Generator, H4TU-R Bert Generator Screen

LTPH-UM-1031-03, Issue 3 Testing

TESTING WITH H4TU-R BERT GENERATOR

The H4TU-R BERT Generator screen allows transmission of an unframed test signal from the H4TU-R towards either the network (NET) or customer (CPE). Bit error rates are calculated and display on the Monitor screen.

1Press R to logon remotely, then press C to select the Config menu (Figure 31).

2Use the ↑ and ↓ arrow keys to select BERT Generator, then press ENTER .

3Use the arrow keys to select an option, then press the SPACEBAR to cycle through the settings. Refer to Table 19 on page 56 for a list of BERT Generator option settings.

4Press ENTER to activate your choice.

5To view BERT status, press ESC twice, then, using the ← arrow key to select the Monitor menu, press

ENTER .

6Press R to return to the H4TU-C logon screen. You can exit the status screen while signal generation is active.

Monitor	Performance Event Log		Config	Inventory	Report Rlogon		Help
	----------------------+					+
		Standard Options			->
			ADC Options		->
			BERT Generator		->

+--------------------------------------			+
BERT Signal Generator	:	ENA
BERT Signal Pattern	:	1 in 8
BERT Signal Linecode	: AMI
BERT Signal Direction	: NET only
BERT Interval	: Continuous
+--------------------------------------			+

Use <Spacebar> to cycle through option settings and		<Enter> to activate
ID: xxxx—-xxxx—-xxxx--xxxx	02/01/2002 12:30:01	H4TU-R	System:	OK___

Figure 31. H4TU-R BERT Generator Screen

The test pattern is sent out either from the line unit towards the network (toward NET) or from the remote unit towards the customer (toward CPE). Both test payloads must be looped back so they can be returned to the unit for BER detection. BER detection is performed in the line unit for both switch settings.

Tests done towards the NET must be looped at some point external to the higher circuit. Tests done towards the CPE can either be looped back at some external point beyond the remote unit, or they can be looped back internally by a higher loopback, such as NREM. The test payload, for the CPE direction, also passes back and forth over the HDSL4 link to the H4TU-C before it is analyzed for errors.

H4TU-C-319 List 1 September 12, 2003 57