The type of protection switching to be used if independent path level
protection switching is enabled on this timeslot. This object is only
relevant for the ring side. Note that ODP is used on shared trunks
that are either FR or TLS trunks. In either case, these shared trunks
can be either STS-1, a VT1.5 or a bundle of VT1.5's.
not-used: Timeslot is provisioned only over a linear interconnet.
Timeslot is not protected at this level in the Timeslot
hierarchy. Example: A VT1.5 row when protection switching
is done at the STS-1 level
unprotected: Timeslot is unprotected. One significance of this is that
if this timeslot becomes unavailable, it will not remain
in service by bumping another peer timeslot using the
same timeslot on another fiber.
odp: Appian's Optical Data Protection. ODP is used on shared
trunks that are either FR or TLS trunks.
uspr: Traditional UPSR can be used on non-shared timeslots such
as PPP trunks and TDM service trunks.