dsx1LineIndex
1.3.6.1.2.1.10.18.6.1.1
This object is the identifier of a DS1 Inter-
face on a managed device. If there is an ifEn-
try that is directly associated with this and
only this DS1 interface, it should have the
same value as ifIndex. Otherwise, the value
exceeds ifNumber, and is a unique identifier
following this rule: inside interfaces (e.g.,
equipment side) with even numbers and outside
interfaces (e.g., network side) with odd
numbers.