cbLoopbackCode

This object specifies the type of the end device and
the type of loopback code used.
              
Latching Loopback: Latching Loopback is appropriate with
64 kbit/s DS0-A rate.  Once invoked by a specific activation
sequence, it typically remains in effect until released by
another specific code sequence.
              
	non-latching loopback:  Non latching activation involves
continuous transmission of loopback command codes, followed
by test data interspersed with command codes.
The possible values are:
	Note: The values 1 to 14 are for farEndLoopback.
	cbLoopback object is farEndLoopback(1) when these values are 
	selected.
              
	nonLatchOCUwithOneDevice(1): Non-latching OCU with one device.
              
	nonLatchOCUwithChainDevices(2): Non-latching OCU with chain
		of devices.
              
	nonLatchCSU(3)                 : Non-latching CSU.
              
	nonLatchDSU(4)                 : Non-latching DSU.
              
	latchDS0Drop(5)                : Latching DS0-DP Drop device.
              
	latchDS0Line(6)                : Latching DS0-DP line device.
              
	latchOCU(7)                    : Latching OCU.
              
	latchCSU(8)                    : Latching CSU.
              
	latchDSU(9)                    : Latching DSU.
              
	latchHL96(10)                  : Latching HL96 device.
              
	v54PN127Polynomial(11)         : For fractional T1.
		This loopback is based on
		CCITT-ITU V.54 and is being
		used to place either a single
		DS0 or a DS0 Bundle(N*DS0) in
		loopback mode.
              
	lineInband(12)                  : This is used for loopback the
		entire T1 line at the far end.
		This is a repeating 5-bit
		pattern(00001).
              
	lineLoopbackESF(13): This loopback result in a full
		1.544Mbit/s loopback of the
		incoming signal at the far end.
		The loopback is activated (latched) and
		deactivated by a bit sequence defined in
		ANSI T1.403 - 1995.
		This corresponds to Facility Data Link
		(FDL)loopbacks on a T1 channel.
		This causes a repeating,16-bit ESF data
		link code word(00001110 11111111) to
		the remote end requesting that it
		enter into a network line loopback.
              
	localLoopback(14): This is for loop back at the 
		near end (facility end).
		This is used to test the internals of the
		device, the interface loops back the 
		outbound traffic from SRM to SM, back to 
		the SRM, hence testing the internal device
		connectivity.
              
	noLoopbackCode(15): This is for situations, where 
		no loopback is needed for bert tests. 
		One example is manual loop back at near or
        far end.
              
	payloadLoopbackESF(16): This loopback results 
		in 1.536 Mbit/s loopback of the payload
		of the incoming signal at the far end.
		The loopback is activated (latched) and 
		deactivated by a bit sequence defined in
		ANSI T1.403 - 1995.
		This corresponds to Facility Data Link
		(FDL)loopbacks on a T1 channel.
		This causes a repeating, 16-bit ESF data
		link code word(00010100 11111111) to
		the remote end requesting that it
		enter into a network payload loopback.
              
	lineLoopbackFEAC(17): Use the FEAC channel to 
		establish a line loopback. 
              
smartJackInband(18): Inband loop code for SmartJack (a Telco owned 
        device that represents the demarcation point of T1 service),
        Ref: TR-TSY-000312.

MIB

CISCO-BERT-MIB

OID

.1.3.6.1.4.1.9.9.185.1.1.1.1.6

Type

column

Access

readwrite

Status

current

Parent

cbConfEntry

Table

cbConfTable

Siblings

14