3Com MSR 50, MSR 30 manual Fundamental CE3 Interface Configuration Commands, Bert CE3 Interface

FUNDAMENTAL CE3 INTERFACE

16 CONFIGURATION COMMANDS

bert (CE3 Interface)

Syntax	bert pattern { 2^7 2^11 2^15 qrss } time number [ unframed ]
	undo bert
View	CE3 interface view
Parameter	pattern: Specifies BERT test mode, which can be 2^7, 2^11, 2^15, and QRSS.
	2^7: Specifies the code stream transmitted is the 7th power of 2 bits in length.
	2^11: Specifies the code stream transmitted is the 11th power of 2 bits in length.
	2^15: Specifies the code stream transmitted is the 15th power of 2 bits in length.
	qrss: Specifies the code stream transmitted is the 20th power of 2 bits in length
	and the number of successive 0s in the code stream is no more than 14.
	time number: Sets the duration (in minutes) of a BERT teat. The number argument
	is in the range 1 to 1,440.
	unframed: Sets the overhead bits of the padding frames for BERT test.
Description	Use the bert command to enable BERT test.
	Use the undo bert command to disable BERT test.
	Multiple BERT test modes exist, as defined in ITU O.151, ITU O.153, and ANSI
	T1.403-1999. Currently, 2^7, 2^11, 2^15, and QRSS are available on a CE3
	interface.
	To perform a BERT test, the local end transmits test data stream, which is returned
	after reaching specific nodes. The local end then checks for the bit error rate by
	comparing the returned data stream with the original, through which the state of
	the link can be determined. BERT test requires that data stream can be looped
	back on specific nodes. You can achieve this by enabling remote loop back on the
	peer.
	You can use the bert command to set the test mode and the test duration. During
	the process of a BERT test, you can check the state and the result of the test. For
	more information, refer to “display controller e1” on page 205.