For most timeslots, this object is an element of the specification of
exactly which timeslot this table row identifies. In some cases,
it is ignored. The ChassisSlot has the following significance for the
various scenarios:
ring: ChassisSlot 1 indicates the timeslot on the westward
transmitting fiber. ChassisSlot 2 indicates the timeslot
on the eastward facing fiber.
ring/interconnect:
ChassisSlot 1 indicates the timeslot on the westward
transmitting fiber and on the linear interconnect fiber
on slot 1. ChassisSlot 2 indicates the timeslot on the
eastward transmitting fiber and the linear interconnect
fiber on slot 2.
linear: ChassisSlot, along with Port, identifies the fiber out
of which this timeslot is extracted.