A stream of bytes used to represent the topology of a given circuit. The format is show below: Version 1 Octet Description Common 0 Version number of this OID. Any time an addition is made, this number shall be incremented. Block 1 Total number of elements in this circuit including endpoints(LTU and/or NTU) and repeaters(SRU1-8) 0 adEShdslInvIndex 1 adEShdslInvPhysicalLinkNumber Element 2 adEShdslStatusPhysicalLinkLabel (network side) Block 3 adEShdslStatusPhysicalLinkLabel (customer side) 4-15 adEShdslInvVendorSerialNumber 16 adEShdslStatusCurrStatus 17 adEShdslSpliceBadSpliceDetected (network side) 18 adEShdslSpliceBadSpliceDetected (customer side) Notes: The Element Block will repeat for each element in the circuit. For example, a circuit with an LTU, NTU and 2 repeaters will be constructed like this if the view is from the LTU. <Common Block>.<Element Block for LTU>.<Element Block for SRU1>.<Element Block for SRU2>.<Element Block for NTU>