Patton electronic 1089/I user manual Symbol Indicators, Test Mode Timing Elapsed Time seconds

(because it originates after the framer) and is intended to be evaluated only by another Processor. If the units are transmitting data and the pattern generator is enabled on one end of the link, the far end will begin receiving unframed packets and assume that the line has gone down. During test modes, the pattern gen- erator is forced to time out before it can cause the DSL link to go down.

Loop Control This part of the Processor is used to control Remote Loopback test mode. In a Remote Loop, the 511/511/E data is looped back to the line and to the remote unit over the DSL span.

Restart Procedure The restart procedure is in place to allow the

and Time Outs units to re-establish a connection after the framer begins seeing unframed packets. The Test Mode Timing Chart below shows the amount of time the framer must see consecutive unframed packets before the unit will restart and try to establish a new line connection. The rea- son that there are different Restart Times will become apparent after reading the rest of the document. The 511/511E Time Out shown refers to the amount of time the 511/511E pattern will be valid. At the end of this time the pattern will automatically turn itself off and the normal data path will be re-established. The ER led will flash indicating to the user that the test has timed out. The ER led will stop flashing once the 511/511E switch is placed into the normal position.

Test Mode Timing

Item		Elapsed Time (seconds)
Start Up	50
Data Mode	4
511/511E Generator Enabled	60	(The generator will stop after 45 seconds.)
Remote End of an RDL	60
511/511E Time Out	45	(The pattern generator will automatically turn
	off after 45 seconds. The ER LED will flash until
	the user turns off the 511/511E switch.)

Symbol Indicators

This symbol designates the origination or the termination of a data path. The direction of the arrow connected distinguish the two data paths.

This symbol designates an invalid data path. If there is data present it should be ignored.

15 16