dsx3bertPattern

This variable determines BERT pattern to be transmitted
on the interface identified by dsx3bertLine or dsx3bertPort.
          
	Bit error measurements are widely used to assess the 
	performance of a digital transmission equipment.  Precise 
	error measurement requires that the bit pattern transmitted 
	is known before hand.  During BER testing a known pattern is 
	transmitted on a interface.  The pattern received on the 
	receive side is checked for bit errors.  In order to measure 
	the performance of digital line under real condition 
	this patterns should also simulate real traffic as closely 
	as possible.  There are two categories of test patterns that 
	can be generated by a BERT equipment: repetitive and 
	pseudo-random.  The former test patterns are zeroes or ones 
	or alternating zeroes and ones; the latter patterns are 
	exponential numbers and conform to CCITT/ITU O.151, O.153.
          
	There are different patterns for different interface speeds.
	This object allows the user to configure this BERT patterns.
          
	The supported values are :
          
	  Repetitive Patterns
          
	allOnes(1): All Ones(Continuous Marks).  This is repeating
		pattern of ones(...1111...).  This provides 
		testing of maximum power level requirements.
		The all one pattern test causes the repeater 
		to consume the maximum amount of power. 
		If there is insufficient DC span power then the
		repeater may begin to fail.
		Typically this pattern is used for a simple
		continuity check.  It may also be used to detect
		the presence of unwanted loop in the network.
          
	allZeros(2): All Zeroes(Continuous spaces).  This is 
		repeating pattern of zeros(...000...). 
		The use of this pattern is to test and verify 
		that the ones density policing mechanism is 
		functioning properly.  This pattern must be 
		used in circuits optioned for B8ZS.
          
	alternateOneZero(3): Alternate one/zero pattern(..1010..).
        This pattern produces a 50% ones density. It is
		used to stress the repeater's DC power
		consumption.
          
	doubleOneZero(4): Double alternate one/zero(..10101010..).
          
	threeInTwentyFour(5): This is a 24 bit pattern which 
        contains 3 ones. The largest string of consecutive 
        zeros is fifteen.
		This pattern is used primarily to test timing(clock)
		recovery and may be used framed or unframed for that
		purpose.  This pattern covers both the minimum ones
		density and the maximum number of consecutive zeros.
          
	oneInSixteen(6): N repetitive pattern, 1 in 16.
          
	oneInEight(7): This is an eight bit pattern which contains
		single one.
        This pattern is used primarily to test timing(clock)
		recovery and may be used framed or unframed for that
		purpose.
		This pattern is used to verify frame synchronization
		by providing the minimum acceptable pulse density.
          
          
	oneInFour(8): This pattern is standard loop up remote code.
		Typically it is used when the loop up remote test 
		fails to place the remote system into loopback.
          
sfLoopUp  (9):  D4/SF Loopback activate/up
		        Valid only for T1 line.
sfLoopDown(10): D4/SF Loopback deactivate/down
		        Valid only for T1 line.
threeBit   (11): Repetitive patterns of 3 bits in length.
fourBit    (12): Repetitive patterns of 4 bits in length.
fiveBit    (13): Repetitive patterns of 5 bits in length.
sixBit     (14): Repetitive patterns of 6 bits in length.
sevenBit   (15): Repetitive patterns of 7 bits in length.
fracT1LoopUp(16): Fractional T1 Loopback activate/up.
fracT1LoopDown(17): Fractional T1 Loopback deactivate/down.
          
nineBit      (18): Repetitive patterns of 9 bits in length.
tenBit       (19): Repetitive patterns of 10 bits in length.
elevenBit    (20): Repetitive patterns of 11 bits in length.
fifteenBit   (21): Repetitive patterns of 15 bits in length.
seventeenBit (22): Repetitive patterns of 17 bits in length.
eighteenBit  (23): Repetitive patterns of 18 bits in length.
twentyBit    (24): Repetitive patterns of 20 bits in length.
twentyBitQRSS(25): 20 bits of Quasi Random Signal Source.
twentyOneBit (26): Repetitive patterns of 21 bits in length.
twentyTwoBit (27): Repetitive patterns of 22 bits in length.
twentyThreeBit (28): Repetitive patterns of 23 bits in length.
twentyFiveBit  (29): Repetitive patterns of 25 bits in length.
twentyEightBit (30): Repetitive patterns of 28 bits in length.
twentyNineBit  (31): Repetitive patterns of 29 bits in length.
thirtyOneBit   (32): Repetitive patterns of 32 bits in length.
thirtyTwo      (33): Repetitive patterns of 33 bits in length.

MIB

CISCO-MGX82XX-DSX3-BERT-MIB

OID

.1.3.6.1.4.1.351.110.6.2.10

Type

scalar

Access

readwrite

Status

current

Parent

dsx3bert